CVE-2026-94663

Executive Summary

CVE-2026-94663 is a blind SQL injection vulnerability in the Metagauss ProfileGrid WordPress plugin, affecting all versions up to and including 6.0.0.2. An authenticated attacker with low privileges can exploit improper neutralization of special elements in SQL commands to extract sensitive information from the underlying database. With a CVSS score of 8.5, this vulnerability poses a significant risk to WordPress sites using the affected plugin, as it allows data exfiltration and potential lateral movement within the database.

Technical Analysis

The vulnerability resides in the ProfileGrid plugin, which provides user profiles, groups, and community features for WordPress. The flaw is classified as CWE-89: Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL injection. Specifically, the NVD description identifies it as a blind SQL injection, meaning the attacker cannot directly see query results but can infer information through boolean or time-based responses.

The root cause is insufficient sanitization or parameterization of user-supplied input that is later incorporated into SQL queries. Because the CVSS vector indicates PR:L (low privileges required), the attacker must have an authenticated session, likely a subscriber-level account or higher. The attack vector is network-based (AV:N), and the scope is changed (S:C), implying the vulnerability can affect resources beyond the vulnerable component, such as the database server or other integrated systems. The confidentiality impact is high (C:H), as blind SQL injection can lead to extraction of usernames, password hashes, email addresses, and other sensitive data. Integrity impact is none (I:N), and availability impact is low (A:L), possibly due to potential time delays from time-based queries.

No specific code-level details, function names, or parameter names are provided in the available intelligence. Therefore, the analysis remains at the vulnerability-class level without fabricating implementation specifics.

Exploitation Scenarios

The exploitation of CVE-2026-94663 follows a typical blind SQL injection attack chain:

1. Reconnaissance/target identification: The attacker identifies WordPress sites running the ProfileGrid plugin version 6.0.0.2 or earlier. This can be done via Shodan searches or by scanning for the plugin's known file paths (e.g., /wp-content/plugins/profilegrid-user-profiles-groups-and-communities/). The attacker also needs a valid low-privileged account, which may be obtained through registration if open, or via other means like credential stuffing.

2. Triggering the flaw: The attacker interacts with a vulnerable endpoint that accepts user input and constructs an SQL query without proper sanitization. The specific parameter is unknown from the description, but it is likely related to profile fields, group management, or search functionality. The attacker injects SQL payloads to manipulate the query.

3. Payload/execution method: Since this is a blind SQL injection, the attacker uses boolean-based or time-based techniques. For boolean-based, the attacker submits payloads that cause the query to return true or false, observing differences in the application's response. For time-based, payloads like '; WAITFOR DELAY '0:0:5'-- (on MSSQL) or ' AND SLEEP(5)-- (on MySQL) are used to induce delays. The attacker systematically extracts data character by character.

4. Post-exploitation impact: Successful exploitation allows the attacker to read arbitrary data from the WordPress database, including user credentials, sensitive configuration, and potentially other plugin data. This can lead to privilege escalation within the WordPress instance, further compromise of the web server, or use of the site for malicious purposes like SEO poisoning or malware distribution. The changed scope (S:C) suggests the attacker might pivot to other systems if the database is shared or if credentials are reused.

No public PoC or exploit code is available; the attack chain is inferred from the vulnerability class and CVSS vector.

Impact Assessment

The business impact of CVE-2026-94663 is high due to the potential for data breaches and unauthorized access to sensitive information. WordPress sites using the ProfileGrid plugin are at risk, particularly community sites, membership platforms, and e-commerce stores that rely on user profiles and groups. The blast radius includes all data stored in the WordPress database, such as user records, private messages, and potentially payment information if integrated with e-commerce plugins. The CVSS score of 8.5 reflects the high confidentiality impact (C:H) and the low privileges required (PR:L), making it attractive for attackers with basic access. The lack of a patch (confidence 0/4) exacerbates the risk, as no official fix is available, and workarounds are not documented. Organizations must rely on virtual patching, Web Application Firewalls (WAF), and strict access controls to mitigate the threat.

Detection Guidance

Sigma Rule

title: Blind SQL Injection Attempt Against ProfileGrid Plugin
id: 8f9a3b2c-1d4e-5f6a-7b8c-9d0e1f2a3b4c
status: experimental
description: Detects potential blind SQL injection attempts targeting the ProfileGrid WordPress plugin (CVE-2026-94663)
author: Threat Intelligence Team
date: 2025-04-09
tags:
  - attack.t1190
  - cve.2026.94663
logsource:
  category: webserver
  product: apache
  service: access_combined
detection:
  selection:
    cs-method: 'POST'
    cs-uri-stem|contains: '/wp-content/plugins/profilegrid-user-profiles-groups-and-communities/'
    cs-uri-query|contains:
      - 'SLEEP('
      - 'BENCHMARK('
      - 'WAITFOR DELAY'
      - 'pg_sleep('
      - 'SELECT'
      - 'UNION'
      - 'OR 1=1'
      - 'AND 1=1'
  condition: selection
falsepositives:
  - Legitimate administrative activity with SQL-like strings
level: high

YARA Rule

rule CVE_2026_94663_ProfileGrid_SQLi
{
    meta:
        description = "Detects blind SQL injection payloads targeting ProfileGrid plugin"
        author = "Threat Intelligence Team"
        date = "2025-04-09"
        reference = "CVE-2026-94663"
        severity = "high"
    strings:
        $sqli1 = "SLEEP(" ascii nocase
        $sqli2 = "BENCHMARK(" ascii nocase
        $sqli3 = "WAITFOR DELAY" ascii nocase
        $sqli4 = "pg_sleep(" ascii nocase
        $sqli5 = "UNION SELECT" ascii nocase
        $sqli6 = "OR 1=1" ascii nocase
        $sqli7 = "AND 1=1" ascii nocase
        $plugin = "profilegrid-user-profiles-groups-and-communities" ascii nocase
    condition:
        $plugin and 1 of ($sqli*)
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-94663 ProfileGrid Blind SQL Injection Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/wp-content/plugins/profilegrid-user-profiles-groups-and-communities/"; http_uri; content:"SLEEP("; http_client_body; nocase; content:"BENCHMARK("; http_client_body; nocase; content:"WAITFOR DELAY"; http_client_body; nocase; content:"UNION SELECT"; http_client_body; nocase; reference:cve,2026-94663; classtype:web-application-attack; sid:10000001; rev:1;)

Elastic Detection

sequence by host.name
  [ network where network.protocol == "http" and http.request.method == "POST" and url.path : "*profilegrid-user-profiles-groups-and-communities*" and url.query : ("*SLEEP(*" or "*BENCHMARK(*" or "*WAITFOR DELAY*" or "*UNION SELECT*") ]

Splunk SPL Query

index=web sourcetype=access_combined
| search method=POST uri_path="/wp-content/plugins/profilegrid-user-profiles-groups-and-communities/*"
| regex form_data="(?i)(SLEEP\(|BENCHMARK\(|WAITFOR DELAY|UNION SELECT|OR 1=1|AND 1=1)"
| table _time, src_ip, uri_path, form_data, status
| sort - _time

Wazuh OSSEC Rule

<group name="web,appsec,">
  <rule id="100001" level="12">
    <decoded_as>web-accesslog</decoded_as>
    <match>POST /wp-content/plugins/profilegrid-user-profiles-groups-and-communities/</match>
    <regex>SLEEP\(|BENCHMARK\(|WAITFOR DELAY|UNION SELECT|OR 1=1|AND 1=1</regex>
    <description>CVE-2026-94663: Blind SQL injection attempt against ProfileGrid plugin</description>
    <mitre>
      <id>T1190</id>
    </mitre>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source).

1. Immediate mitigations:

   • Deploy a Web Application Firewall (WAF) with virtual patching rules to block SQL injection patterns targeting the ProfileGrid plugin.
   • Restrict access to the plugin's endpoints to trusted IP addresses or authenticated users only.
   • Monitor web server logs for suspicious SQL injection attempts and alert on patterns like SLEEP(, BENCHMARK(, WAITFOR DELAY, UNION SELECT.
   • Disable or remove the ProfileGrid plugin if not essential, as no patch is available.

2. Patch/upgrade steps:

   • No vendor patch is currently available. Monitor the Metagauss website and WordPress plugin repository for updates. Once a patched version is released, upgrade immediately.
   • If a patch becomes available, test in a staging environment before deploying to production.

3. Long-term hardening:

   • Enforce the principle of least privilege for database accounts used by WordPress.
   • Implement parameterized queries and input validation in custom code and plugins.
   • Regularly update all WordPress core, themes, and plugins.
   • Conduct security audits and vulnerability scans of WordPress installations.
   • Use a Web Application Firewall with up-to-date signatures.

References

1. NVD - CVE-2026-94663: https://nvd.nist.gov/vuln/detail/CVE-2026-94663
2. MITRE CWE-89: https://cwe.mitre.org/data/definitions/89.html
3. WordPress Plugin Repository - ProfileGrid: https://wordpress.org/plugins/profilegrid-user-profiles-groups-and-communities/
4. CISA Known Exploited Vulnerabilities Catalog (not listed): https://www.cisa.gov/known-exploited-vulnerabilities-catalog
5. OWASP SQL Injection Prevention Cheat Sheet: https://cheatsheetseries.owasp.org/cheatsheets/SQL_Injection_Prevention_Cheat_Sheet.html