CVE-2023-34179

Executive Summary

CVE-2023-34179 is a SQL Injection vulnerability residing in the Groundhogg WordPress plugin, affecting all versions through 2.7.11. The flaw stems from improper neutralization of special elements used in an SQL command, allowing an unauthenticated attacker to inject arbitrary SQL queries into the plugin's database interactions. Successful exploitation can lead to data exfiltration, authentication bypass, and potentially full site compromise. The patch is claimed to be available in version 2.7.11.1, though it remains unconfirmed by independent sources.

Technical Analysis

The vulnerability is classified as CWE-89 (SQL Injection). Groundhogg is a marketing automation and CRM plugin for WordPress, which inherently handles significant volumes of user-supplied data and maintains its own database tables for contacts, funnels, email campaigns, and related marketing artifacts.

The NVD description indicates "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')" — this is the classic SQLi vulnerability class whereby user-controlled input is concatenated into SQL queries without proper sanitization, parameterization, or escaping. Because the description does not specify the exact parameter, endpoint, or function where the injection occurs, we must reason at the class level.

Given the plugin's architecture, potential injection points include filter parameters, sort order fields, search strings within contact management interfaces, funnel builder previews, or any AJAX handler that accepts raw input destined for a SELECT, UPDATE, DELETE, or INSERT statement. The lack of specific technical detail in the NVD record means we cannot identify the precise sink; however, the vulnerability class permits time-based blind, boolean-based blind, or UNION-based injection techniques.

The attack surface is the WordPress frontend and, more critically, unauthenticated AJAX endpoints (wp_ajax_nopriv_* actions) that Groundhogg may expose for tracking, form submission, or funnel rendering. Since the CVSS vector implies network attack vector with no privileges required (AV:N / PR:N), the injection point is accessible without prior authentication, although the high attack complexity (AC:H) suggests the vulnerable parameter may be obscured behind multiple layers of logic or require specific input conditions.

Groundhogg's operational context amplifies severity: as a CRM, its database contains personal identifiable information (PII), email marketing lists, purchase histories, and potentially payment metadata — making a successful injection highly damaging from a privacy compliance standpoint (GDPR, CCPA).

Exploitation Scenarios

Step 1 — Reconnaissance/Target Identification: An attacker begins by scanning the internet for WordPress sites running the Groundhogg plugin. Fingerprinting can be achieved via passive techniques (HTTP headers, query strings like /?groundhogg...) or active banner grabbing. The Shodan dorks provided (html:"groundhogg", title:"Groundhogg") aid mass discovery of exposed instances.

Step 2 — Vulnerability Trigger: The attacker locates an input parameter that is processed by the plugin and passed unsafely into an SQL query. Because the NVD description does not designate a specific parameter, the attacker must fuzz the plugin's forms, shortcode handlers, and AJAX endpoints to identify the injectable parameter. The attack complexity (AC:H) suggests this step requires some reverse engineering or observation of the plugin's request patterns.

Step 3 — Payload Execution: At the class level, the attacker injects SQL metacharacters (e.g., single quotes, comment syntax) into the vulnerable parameter to break out of the intended query context. A time-based payload (e.g., SLEEP() in MySQL) may be used for boolean-blind extraction if the error responses are suppressed, or a UNION-based payload could be crafted to directly exfiltrate data if the query structure is inferable. The backend database for WordPress is typically MySQL/MariaDB, so the attacker will tailor syntax accordingly.

Step 4 — Post-Exploitation Impact: Upon successful injection, the attacker can extract the WordPress users table to obtain admin credentials (password hashes for offline cracking), retrieve Groundhogg contact lists containing PII and email addresses (enabling phishing campaigns), or inject malicious SQL to create a new administrative user. With admin access, the attacker can upload a webshell, achieving persistent remote code execution. The blast radius expands from data breach to full WordPress site takeover, and potentially lateral movement to the hosting server if file write permissions are misconfigured.

Note: No public PoC or exploit code is available for this CVE. The attack chain is inferred from the vulnerability class and the plugin's functional role; specific payload syntax or injection points cannot be verified without access to the plugin source code.

Impact Assessment

Business Impact: A successful exploitation of CVE-2023-34179 transforms a marketing database into an attacker's treasure trove. The exfiltration of contact PII — emails, names, phone numbers, purchase history — violates data protection regulations and erodes customer trust. The potential for credential theft (via the wp_users table) elevates this from a data-leak incident to an account-takeover and site-takeover scenario.

Affected Systems: All websites running the Groundhogg WordPress plugin version 2.7.11 or earlier. Since Groundhogg is typically deployed on shared or dedicated WordPress hosting, the affected system includes the web server, the MySQL/MariaDB database server, and any integrated email marketing services.

CVSS Breakdown: The CVSS score of 7.6 (High) with vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L reflects: a network-exploitable vulnerability (AV:N) that requires no privileges (PR:N) or user interaction (UI:N); the high attack complexity (AC:H) tempers the score from the theoretical maximum; and the impact is contained within the vulnerable component (S:U — scope unchanged) with high confidentiality loss (C:H), and low integrity (I:L) and availability (L:A) impacts.

Blast Radius: The direct blast radius is the Groundhogg database tables. However, the indirect radius extends to all WP users (admin takeover), the email marketing campaign integrity (adversary-controlled spam/phishing emails sent from a trusted domain), and downstream customers of the WordPress site.

Detection Guidance

Sigma Rule

title: Groundhogg WordPress Plugin SQL Injection Attempt
id: 6f3a0b1e-5a2c-4d8e-9f1b-3c2d4e5f6a7b
status: experimental
description: Detects potential SQL injection attempts targeting the Groundhogg plugin <= 2.7.11 based on suspicious SQL metacharacters in WordPress request parameters.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2023-34179
author: Valtersit Threat Intelligence
date: 2024/01/15
tags:
    - attack.t1190
    - attack.initial_access
logsource:
    category: webserver
    product: apache
    definition: 'Web server access logs capturing HTTP request URIs and query strings.'
detection:
    selection_groundhogg_sql:
        cs-uri-query|contains:
            - 'groundhogg'
    selection_sql_metachars:
        cs-uri-query|contains:
            - ' UNION SELECT'
            - ' UNION ALL'
            - ' SLEEP('
            - ' BENCHMARK('
            - ' WAITFOR DELAY'
            - " ' OR '1'='1"
            - " '; DROP TABLE"
            - " '; UPDATE "
        cs-uri-query|contains|all:
            - 'groundhogg'
    condition: selection_groundhogg_sql and selection_sql_metachars and selection_sql_metachars[custom]
level: high
falsepositives:
    - Legitimate plugin functionality that uses similar query parameters in a non-malicious manner (rare).
fields:
    - clientip
    - cs-uri-query
    - sc-status

YARA Rule

rule Groundhogg_SQLi_Attempt_CVE_2023_34179
{
    meta:
        author = "Valtersit Threat Intelligence"
        description = "Detect SQL injection attempts targeting Groundhogg WordPress plugin <= 2.7.11"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2023-34179"
        date = "2024-01-15"
        cve = "CVE-2023-34179"
        severity = "high"
    strings:
        $sqli_union = "union select"
        $sqli_union_all = "union all select"
        $sqli_sleep = "sleep("
        $sqli_benchmark = "benchmark("
        $sqli_or_true = "' or '1'='1"
        $sqli_comment = "--"
        $sqli_comment_hash = "#"
        $plugin_ref = "groundhogg"
        $plugin_shortcode = "[groundhogg_"
    condition:
        any of ($sqli_*) and any of ($plugin_*)
}

Suricata IDS Rule

alert http any any -> $HOME_NET any (msg:"CVE-2023-34179 Groundhogg SQL Injection Attempt"; flow:to_server,established; content:"GET"; http_method; content:"groundhogg"; http_uri; nocase; content:"SELECT"; http_uri; nocase; within:200; pcre:"/(UNION\s+(ALL\s+)?SELECT|SLEEP\s*\(|BENCHMARK\s*\(|WAITFOR\s+DELAY)/i"; classtype:web-application-attack; reference:cve,2023-34179; sid:10034179; rev:1; priority:1;)

Elastic Detection

sequence by source.ip
  [network where event.action == "connection_attempted" and destination.port == 80]
  [http where http.request.method == "GET" and
   url.original like "*groundhogg*" and
   (
     url.original like "*union*select*" or
     url.original like "*sleep(*" or
     url.original like "*benchmark(*" or
     url.original like "*waitfor*delay*" or
     url.original like "*' or '1'='1*"
   )]

Splunk SPL Query

index=web sourcetype=access_combined
| where LIKE(uri, "%groundhogg%")
| rex field=_raw "(?<suspicious_pattern>(UNION\s+SELECT|SLEEP\s*\(|BENCHMARK\s*\(|WAITFOR\s+DELAY|' OR '1'='1|--))"
| where isnotnull(suspicious_pattern)
| stats count by src_ip, uri, http_user_agent, suspicious_pattern
| eval threat="CVE-2023-34179 Groundhogg SQL Injection Attempt"
| table _time, src_ip, uri, http_user_agent, suspicious_pattern, count

Wazuh OSSEC Rule

<group name="web,attacks,">
  <rule id="341791" level="12">
    <decoded>
      <prematch>^GET</prematch>
    </decoded>
    <regex>(?i)groundhogg.*(union\s+select|sleep\s*\(|benchmark\s*\(|waitfor\s+delay|'\s+or\s+'1'='1)</regex>
    <description>CVE-2023-34179: Potential SQL Injection attempt against Groundhogg WordPress plugin.</description>
    <mitre>
      <id>T1190</id>
    </mitre>
    <group>sql_injection,pci_dss_6.5.1,gdpr_art_32,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch Confidence: 2/4 (CLAIMED — single source claims patch, not independently confirmed). Note: While the CNA lists version 2.7.11.1 as the fix, this has not been independently verified by a second source.

1) Immediate Mitigations:

• Deploy a Web Application Firewall (WAF) with ruleset covering SQL injection patterns (OWASP CRS rules 942xxx) for the Groundhogg path.
• Restrict access to any Groundhogg-specific AJAX endpoints via IP allowlist if the plugin's functionality permits.
• Disable the plugin entirely if it is not business-critical, until patch verification is completed.

2) Patch/Upgrade Steps:

• Update the Groundhogg plugin to version 2.7.11.1 or higher via the WordPress admin dashboard (Plugins → Installed Plugins → Groundhogg → Update Now).
• If the automatic update fails, manually download the updated zip from the vendor's site and replace the plugin directory via FTP/SFTP.
• After updating, clear all caches (including object cache, page cache, CDN) and verify the new version number in the plugin listing.
• Re-scan the site with a WordPress security scanner (e.g., WPScan) to confirm the CVE is no longer flagged.

3) Long-Term Hardening:

• Implement a patch management policy for WordPress plugins with automated update notifications and staging-site testing before production apply.
• Enforce least-privilege database users: the WordPress DB user should have minimal permissions for the groundhogg tables (ideally SELECT/INSERT/UPDATE only; no DROP or GRANT).
• Regularly audit and prune WordPress users, removing unused admin accounts to reduce the blast radius of credential theft via SQLi.
• Subscribe to the Patchstack vulnerability feed to receive timely notifications for WordPress plugin vulnerabilities.
• Implement database activity monitoring to detect anomalous query patterns originating from the web application layer.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2023-34179 — Official NVD record containing the CVE description and references.
2. Patchstack Advisory: https://patchstack.com/database/vulnerability/groundhogg/ — Vendor CNA advisory with patch details and affected version history. (Note: This is the CNA that claimed the patch; URL is inferred from typical Patchstack URL structure.)
3. WordPress Plugin Repository: https://wordpress.org/plugins/groundhogg/ — Official distribution channel where patched versions are released; used by admins to manually update.
4. CWE-89 Details: https://cwe.mitre.org/data/definitions/89.html — Weakness definition for Improper Neutralization of Special Elements used in an SQL Command.

Threat Actor Activity: As of this writing, CVE-2023-34179 is not listed in CISA's Known Exploited Vulnerabilities catalog, and no publicly documented exploit-in-the-wild campaigns or ransomware/DDoS botnet integrations have been observed. However, SQL injection vulnerabilities in WordPress plugins are routinely probed by automated exploit scanners once disclosed; the EPSS score of 0.00675 (48.9th percentile) indicates a moderate baseline probability of exploitation attempts in the wild, and the "Unknown" PoC status should not be interpreted as "safe" — security teams should prioritize patching given the vulnerability's direct path to credential theft and site takeover.