Threat Intelligence Report: CVE-2026-57777

Executive Summary

CVE-2026-57777 is a Blind SQL Injection vulnerability in Automattic WooCommerce, affecting all versions before 11.0. The vulnerability stems from improper neutralization of special elements used in an SQL command, enabling an authenticated attacker with high privileges to execute blind SQL injection attacks against the underlying database. Successful exploitation results in high confidentiality impact (database content disclosure) and low availability impact, with a CVSS score of 7.6. As of this writing, no vendor patch exists, and no public proof-of-concept or exploit code has been identified, though the vulnerability remains actively exploitable in all unpatched WooCommerce installations.

Technical Analysis

Vulnerability Class and Mechanism

CVE-2026-57777 is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), specifically manifesting as a Blind SQL Injection vulnerability. The NVD description confirms the vulnerability exists in Automattic WooCommerce, a widely deployed WordPress e-commerce plugin, and affects all versions prior to 11.0.

The vulnerability mechanism follows the standard blind SQL injection pattern: the application receives user-supplied input that is incorporated into an SQL query without adequate sanitization, parameterization, or escaping. Because the injection is "blind," the application does not return database error messages or query results directly to the attacker. Instead, the attacker must infer the outcome of their injected conditions through boolean-based (comparing differing application responses to true/false conditions) or time-based (inducing delays via functions like SLEEP() or BENCHMARK()) techniques.

Attack Surface

The vulnerable component resides within WooCommerce's administrative or high-privilege functionality, given the CVSS vector requirement of PR:H (High Privileges). This suggests the injection point is likely within an admin-facing feature — potentially a reporting tool, order management dashboard, analytics module, or configuration interface that constructs database queries from user-controlled parameters. An attacker must possess at least a shop manager or administrator-level role in the WordPress installation to reach the vulnerable code path.

Technical Limitations

Insufficient technical detail is available from the NVD description regarding the specific injection point, affected functions, parameter names, or HTTP endpoints. Without vendor disclosure, the precise code location cannot be confirmed. The technical analysis herein is based on the vulnerability class and known architectural patterns of WooCommerce implementations, without fabrication of specific function names, file paths, or URL structures.

Why Blind SQL Injection Is Significant

Even without direct output, blind SQL injection allows an attacker to:

• Extract any data from the database — including WordPress user credentials (password hashes), WooCommerce customer PII (names, addresses, email, phone numbers), and payment metadata.
• Enumerate database schema — table names, column names, and database versions through inference.
• Potentially write files or escalate — if the database user has sufficient privileges (e.g., FILE privilege), though this is less common in properly configured WordPress installations.
• Attempt error-based or out-of-band exfiltration — through DNS or HTTP requests if the database server permits network access.

Exploitation Scenarios

Important preamble: No public PoC is available for CVE-2026-57777. The attack chain below is inferred from the vulnerability class (blind SQL injection) and the CVSS vector characteristics. Specific implementation details should not be assumed.

Step 1: Reconnaissance and Target Identification

An attacker begins by scanning for WordPress installations running WooCommerce. Shodan queries targeting the product, or simple HTTP banner checks revealing WooCommerce plugin paths, allow the attacker to build a target list. The attacker then validates the WooCommerce version to confirm it is below 11.0, potentially by reading the plugin's readme file, version strings in page source, or via REST API endpoint disclosure.

Step 2: Privileged Access Acquisition

Given the PR:H (high privilege) requirement in the CVSS vector, the attacker must first obtain valid credentials for an account with elevated WooCommerce permissions (Shop Manager or Administrator). Attack vectors for credential acquisition include:

• Credential stuffing attacks using leaked password databases
• Phishing campaigns targeting known WooCommerce administrators
• Lateral movement from a lower-privileged WordPress account (e.g., subscriber) through separate vulnerabilities
• Brute-force attacks on the WordPress login page (wp-login.php)

Step 3: Triggering the Blind SQL Injection

Once authenticated with high privileges, the attacker navigates to the vulnerable administrative interface within WooCommerce. The attacker submits crafted input to the injection point — likely a parameter controlling report filters, date ranges, product sorting, or user lookups — embedding SQL conditional logic that causes observable differences in application behavior.

The attack proceeds via boolean-based inference. For example, an attacker might inject conditions that test whether the first character of the database name matches a guessed value. Based on whether the page loads normally or returns an error, or whether content appears differently, the attacker deduces the truth value of each condition.

Step 4: Data Exfiltration

Through repeated boolean or time-based queries, the attacker systematically extracts:

• Administrator password hashes — enabling offline cracking and full WordPress account takeover
• Customer PII — names, physical addresses, phone numbers, and email addresses held in WooCommerce's customer and order tables
• Order data — purchase history, transaction metadata, and payment processor references (not full payment card data, as this is typically tokenized)
• Configuration secrets — API keys, database credentials, and other sensitive configuration values that may be stored in the database

Step 5: Post-Exploitation Impact

With extracted administrator hashes cracked offline, the attacker achieves full administrative compromise of the WordPress installation, potentially:

• Installing backdoor plugins or themes for persistent access
• Modifying site content for SEO spam or defacement
• Redirecting checkout flows to attacker-controlled payment pages
• Using the compromised server as a launchpad for further attacks into the hosting environment

Impact Assessment

CVSS Breakdown Context

The CVSS vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L yields a base score of 7.6, indicating:

• Attack Vector: Network (AV:N) — The vulnerability is exploitable remotely over the network
• Attack Complexity: Low (AC:L) — No special conditions or race conditions needed
• Privileges Required: High (PR:H) — Valid high-privilege WooCommerce access required
• User Interaction: None (UI:N) — No victim action required
• Scope: Changed (S:C) — The impact extends beyond the vulnerable component, affecting the underlying database resource
• Confidentiality: High (C:H) — Complete disclosure of database contents possible
• Availability: Low (A:L) — Potential for reduced availability, possibly through resource exhaustion during time-based inference attacks

Business Impact

For enterprise organizations relying on WooCommerce:

1. Data Breach Consequences — Exposure of customer PII triggers regulatory obligations (GDPR, CCPA, PCI DSS) including mandatory breach notification, potential fines, and reputational damage.

2. Credential Compromise — WordPress administrator account compromise allows complete site takeover with downstream technical and business consequences.

3. Supply Chain Risk — If the compromised WooCommerce instance is part of a wider ecosystem, attackers may leverage it to pivot toward other connected systems.

4. Fraud and Financial Loss — Exfiltrated customer data enables targeted phishing, fraud, and social engineering campaigns against the affected customer base.

Affected Systems

All WooCommerce installations running versions prior to 11.0 are at risk. Given WooCommerce's substantial market share in the e-commerce plugin segment (estimated at millions of active installations), the potential blast radius is significant.

Detection Guidance

The following detection content focuses on identifying both pre-authentication scanning for WooCommerce versions and post-authentication anomalous database query behavior characteristic of blind SQL injection attempts.

Sigma Rule

title: WooCommerce Blind SQL Injection - CVE-2026-57777
id: c687823d-8b44-402c-9eaa-c93617451de1
status: experimental
description: Detects potential blind SQL injection attempts targeting WooCommerce versions below 11.0, focusing on suspicious database error patterns and time-delay query characteristics.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-57777
author: Valters IT Security Team
date: 2026/01/15
logsource:
    category: web_application
    product: woocommerce
detection:
    selection_sqli_keywords:
        http.user_agent|contains:
            - 'sqlmap'
            - 'havij'
            - 'sqlninja'
        http.url_query|contains:
            - 'sleep('
            - 'benchmark('
            - "waitfor delay"
            - "pg_sleep"
            - "substring("
            - "ascii("
            - "char("
    selection_time_delay:
        http.response.time_taken: '>5000'
    selection_error_patterns:
        http.response.body|contains:
            - 'mysql_fetch'
            - 'You have an error in your SQL syntax'
            - 'Warning: mysql_'
            - 'SQLSTATE'
    condition: selection_sqli_keywords or (selection_time_delay and selection_error_patterns)
    level: high
falsepositives:
    - Legitimate administrative queries that take significant time
    - Security scanners performing authorized testing
tags:
    - attack.t1190
    - cve.2026-57777
    - cwe.89

YARA Rule

rule CVE_2026_57777_WooCommerce_Blind_SQLi_Signatures
{
    meta:
        author = "Valters IT Security Team"
        description = "Detects payload patterns associated with blind SQL injection attempts against WooCommerce installations"
        date = "2026-01-15"
        cve_id = "CVE-2026-57777"
        severity = "high"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-57777"
    
    strings:
        $s1 = "SLEEP(" ascii nocase
        $s2 = "BENCHMARK(" ascii nocase
        $s3 = "WAITFOR DELAY" ascii nocase
        $s4 = "pg_sleep(" ascii nocase
        $s5 = "AND SUBSTRING(" ascii nocase
        $s6 = "OR SUBSTRING(" ascii nocase
        $s7 = "AND ASCII(" ascii nocase
        $s8 = "if(" ascii nocase
        $s9 = "information_schema" ascii nocase
        $s10 = "SELECT CASE WHEN" ascii nocase
        $s11 = "ORD(MID(" ascii nocase
        $s12 = "CHAR(" ascii nocase
        $url1 = "wp-admin/admin-ajax.php" ascii nocase
        $url2 = "wp-admin/admin.php" ascii nocase
        $url3 = "wc-admin" ascii nocase
        
    condition:
        uint16(0) == 0x3C21 and  // HTML response or text-based input inspection
        (2 of ($s*) or ($url1 and any of ($s*)) or ($url2 and any of ($s*)) or ($url3 and any of ($s*)))
}

rule WooCommerce_Version_Detect_Pre_11
{
    meta:
        author = "Valters IT Security Team"
        description = "Detects WooCommerce version identifiers indicating installations below 11.0, which are vulnerable to CVE-2026-57777"
        date = "2026-01-15"
        cve_id = "CVE-2026-57777"
        severity = "medium"
    
    strings:
        $ver1 = "WooCommerce</a> - Version 10." ascii nocase
        $ver2 = "WooCommerce</a> - Version 9." ascii nocase
        $ver3 = "WooCommerce</a> - Version 8." ascii nocase
        $ver4 = "WooCommerce</a> - Version 7." ascii nocase
        $ver5 = "WooCommerce</a> - Version 6." ascii nocase
        $ver6 = "WooCommerce</a> - Version 5." ascii nocase
        $ver7 = "WooCommerce</a> - Version 4." ascii nocase
        $ver8 = "WooCommerce</a> - Version 3." ascii nocase
        $ver9 = "woocommerce/woocommerce.php" ascii nocase
        
    condition:
        any of ($ver*) 
}

Suricata IDS Rule

alert http any any -> $HOME_NET any (msg:"CVE-2026-57777 - WooCommerce Blind SQL Injection Attempt"; flow:established,to_server; content:"GET"; http_method; content:"wp-admin"; http_uri; nocase; pcre:"/(?:admin-ajax\.php|admin\.php|wc-admin)/Ui"; pcre:"/(?:sleep|benchmark|waitfor|pg_sleep|substring|ascii|char|information_schema|select.*case.*when)/Ui"; classtype:web-application-attack; sid:2026577; rev:1; priority:1; reference:cve,2026-57777; reference:url,https://nvd.nist.gov/vuln/detail/CVE-2026-57777; metadata:created_at 2026_01_15, updated_at 2026_01_15;)

alert http any any -> $HOME_NET any (msg:"CVE-2026-57777 - WooCommerce SQL Injection Time-Based Payload"; flow:established,to_server; content:"POST"; http_method; content:"wp-admin"; http_uri; nocase; content:"sleep"; http_client_body; nocase; content:"benchmark"; http_client_body; nocase; classtype:web-application-attack; sid:2026578; rev:1; priority:1; reference:cve,2026-57777; metadata:created_at 2026_01_15;)

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2026-57777 - WooCommerce SQLi Exfiltration via Error Messages"; flow:established,to_client; content:"You have an error in your SQL syntax"; http.server_body; nocase; classtype:attempted-recon; sid:2026579; rev:1; priority:2; reference:cve,2026-57777; metadata:created_at 2026_01_15;)

Elastic Detection

// EQL Query for detecting WooCommerce blind SQL injection exploitation patterns
// Look for HTTP requests to wp-admin endpoints with SQL injection payload characteristics

sequence by source.ip with maxspan=5m
  [network where event.category == "web" and network.protocol == "http" and
   url.path like "*wp-admin*" and
   (url.query like "*sleep*" or url.query like "*benchmark*" or 
    url.query like "*substring*" or url.query like "*information_schema*" or
    url.query like "*ascii*" or url.query like "*char*" or
    url.query like "*select*case*when*") and
   user_agent.original like "*sqlmap*" or user_agent.original like "*curl*"]
   
// Look for repeated anomalous queries from same source — characteristic of blind inference
  [network where event.category == "web" and network.protocol == "http" and
   url.path like "*admin*" and 
   (url.query like "*and*" or url.query like "*or*") and
   (url.query like "*1=1*" or url.query like "*1=2*")]
  | stats request_count = count() by source.ip
  | where request_count > 50

Splunk SPL Query

index=web sourcetype=access_combined 
  [search index=web sourcetype=access_combined 
    uri_path="*/wp-admin/*"
    | rex field=_raw "(?i)(?:sleep|benchmark|waitfor|pg_sleep|substring|ascii|char|information_schema|union select|sElect.*case.*when)"
    | stats count by src_ip 
    | where count > 20]
| stats count, earliest(_time) as first_seen, latest(_time) as last_seen by src_ip, uri_path
| where count > 20
| eval alert_severity = case(count >= 100, "CRITICAL", count >= 50, "HIGH", count >= 20, "MEDIUM")
| sort - count
| table _time, src_ip, uri_path, count, first_seen, last_seen, alert_severity
| rename src_ip as "Source IP", uri_path as "Requested URI Path", count as "Request Count"

// Alternative query for time-based SQLi detection (response latency anomalies):
index=web sourcetype=access_combined 
  uri_path="*/wp-admin/*"
  | eval response_time = time_taken
  | where response_time > 5000
  | stats count by src_ip, uri, response_time
  | where count > 10
  | table _time, src_ip, uri, response_time, count

Wazuh OSSEC Rule

<group name="web,attack,sqli,">
    <!-- Rule 1: Detect SQL injection patterns in WooCommerce admin requests -->
    <rule id="202677" level="12">
        <if_sid>31100</if_sid>
        <match>wp-admin</match>
        <regex>(?i)(sleep\s*\(|benchmark\s*\(|WAITFOR\s+DELAY|pg_sleep\s*\(|substring\s*\(|information_schema|ascii\s*\(|char\s*\(|UNION\s+SELECT|SELECT\s+CASE\s+WHEN)</regex>
        <description>CVE-2026-57777: WooCommerce blind SQL injection attempt detected in HTTP request</description>
        <group>attack,sqli,cve202657777,</group>
        <mitre>
            <id>T1190</id>
        </mitre>
        <alert_level>12</alert_level>
        <options>no_full_log</options>
    </rule>

    <!-- Rule 2: Detect multiple SQLi attempts from same source IP (blind inference pattern) -->
    <rule id="202678" level="14" frequency="15" timeframe="120">
        <if_matched_sid>202677</if_matched_sid>
        <same_source_ip />
        <description>CVE-2026-57777: Repeated blind SQL injection attempts from same source - likely exploitation in progress</description>
        <group>attack,sqli,cve202657777,repeated_attempts</group>
        <mitre>
            <id>T1190</id>
        </mitre>
        <alert_level>14</alert_level>
    </rule>

    <!-- Rule 3: Detect SQL error leak from vulnerable WooCommerce response -->
    <rule id="202679" level="8">
        <if_sid>31100</if_sid>
        <match>wp-admin</match>
        <regex>(?i)(You have an error in your SQL syntax|mysql_fetch|SQLSTATE|Warning:\s+mysql_|PDOException)</regex>
        <description>CVE-2026-57777: Potential SQL injection error message disclosure from WooCommerce endpoint</description>
        <group>attack,sqli,cve202657777,error_leak,</group>
        <options>no_full_log</options>
    </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 — UNPATCHED. No vendor patch, security advisory, or fix commit has been identified from any tracked source as of this report. WooCommerce versions before 11.0 remain vulnerable.

1) Immediate Mitigations (No Patch Available)

While awaiting an official fix from Automattic, organizations should implement the following compensating controls:

• Restrict Administrative Access: Limit WooCommerce admin and shop manager role assignments to the absolute minimum number of personnel. Implement IP allowlisting for wp-admin access where technically feasible.
• Enforce MFA: Mandate multi-factor authentication for all accounts with WooCommerce administrative privileges to reduce the risk of credential compromise — the likely precursor for exploiting this vulnerability.
• Web Application Firewall (WAF) Rules: Deploy WAF rules to inspect administrative traffic for SQL injection payload patterns. Focus on the detection signatures provided in the Suricata and Sigma rules above, specifically filtering for SLEEP(), BENCHMARK(), WAITFOR DELAY, pg_sleep(), and SUBSTRING() expressions.
• Database Hardening: Ensure the WooCommerce database user account operates with least privilege — restricted to necessary SELECT, INSERT, UPDATE, DELETE operations only. Remove elevated privileges such as FILE, SUPER, or GRANT OPTION if present.
• Database Activity Monitoring: Enable and monitor database audit logs for anomalous query patterns from the web application user, particularly queries containing conditional logic or system table access.

2) Patch and Upgrade Steps

• Monitor the official WooCommerce release channel (https://woocommerce.com/changelog/) and Automattic security advisories for the release of version 11.0 or later containing the fix.
• Upon release, upgrade WooCommerce to version 11.0 or the latest patched version immediately.
• Before upgrading, take a full backup of the WordPress installation including the filesystem and database to allow rollback if needed.
• Test the upgrade in a staging environment before production deployment.
• Subscribe to the WooCommerce security announcement mailing list and the WPScan vulnerability database (https://wpscan.com/) for real-time notification of patch availability.

3) Long-Term Hardening Recommendations

• WordPress Core Updates: Keep WordPress core, all plugins, and themes updated to the latest versions.
• Least Privilege Architecture: Review and minimize the number of users with high-privilege roles. Implement role-based access control and audit high-privilege account usage regularly.
• Credential Hygiene: Enforce strong password policies, regular rotation, and prohibit password reuse across administrative accounts.
• Network Segmentation: Place the WordPress/WooCommerce server in a segmented network zone with restricted egress traffic, limiting the potential for data exfiltration even if the database is compromised.
• Database Security: Run database servers on dedicated hosts or containers, restrict network access to the database, and ensure the WordPress application connects with a dedicated, least-privileged database user.
• Security Monitoring: Continuously monitor administrative traffic patterns and implement the detection rules provided in this report within your SIEM/SOC stack.
• Incident Response Readiness: Update incident response playbooks to include specific procedures for WooCommerce compromise scenarios, including customer data breach notification workflows.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-57777 — Official NVD record with vulnerability description, CVSS scoring, and CWE classification.

2. WooCommerce Changelog & Releases: https://woocommerce.com/changelog/ — Official release channel for tracking the patched version 11.0.

3. WPScan Vulnerability Database: https://wpscan.com/ — Independent WordPress vulnerability database that will track this CVE and associated plugin vulnerability data.

4. Automattic Security Announcements: https://automattic.com/for-security/ — Vendor security notifications and advisory channels.

5. CISA Known Exploited Vulnerabilities Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog — CVE-2026-57777 is NOT currently listed on CISA KEV; however, this page should be monitored for potential additions as exploit activity emerges.

Report Metadata

• Report ID: VALT-2026-0014
• Classification: TLP:CLEAR
• Report Date: 2026-01-15
• Prepared by: Valters IT Security — Cyber Threat Intelligence Team
• Status: Vulnerable — Exploit Code: None Reported | CISA KEV: NO | Patch Available: NO