CVE-2026-6674: 
WordPress vulnerability analysis and mitigation

CVE-2026-6674 is a SQL Injection vulnerability in the "CMS für Motorrad Werkstätten" plugin for WordPress, affecting all versions up to and including 1.0.0. The flaw exists in the arttype parameter due to insufficient escaping of user-supplied input and lack of prepared SQL statements. It was disclosed on April 21, 2026, with Wordfence as the reporting CNA. The vulnerability carries a CVSS v3.1 base score of 6.5 (Medium) (Wordfence Advisory, Github Advisory).

The vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The affected code resides in includes/cfmw-positions.php (lines 202 and 207), where the arttype parameter is incorporated into an SQL query without proper escaping or parameterization, allowing an attacker to append malicious SQL clauses. Exploitation requires only subscriber-level authentication (low privileges), is network-accessible, and requires no user interaction, making it straightforward to abuse in environments where open registration is enabled (Wordfence Advisory, WordPress Plugin Trac).

Successful exploitation allows authenticated attackers with subscriber-level access or higher to extract sensitive information from the WordPress database, including user credentials, personal data, configuration details, and other confidential content stored in the database. The impact is limited to confidentiality — integrity and availability are not directly affected by this vulnerability. However, extracted credentials or sensitive data could facilitate further attacks such as account takeover or privilege escalation (Github Advisory, Wordfence Advisory).

There is no public proof-of-concept exploit and no evidence of in-the-wild exploitation at the time of disclosure. The EPSS score is approximately 0.013% (2nd percentile), indicating a low near-term exploitation probability. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported (Github Advisory, Wordfence Advisory).

1. Reconnaissance: Identify WordPress sites running the "CMS für Motorrad Werkstätten" plugin (version ≤ 1.0.0) using tools like WPScan or by checking plugin directories exposed via the target site.
2. Obtain Subscriber Access: Register for a subscriber-level account on the target WordPress site (if open registration is enabled) or use compromised credentials.
3. Identify Vulnerable Parameter: Locate the plugin functionality that processes the arttype parameter, typically via a front-end or admin-facing request handled in cfmw-positions.php.
4. Craft SQL Injection Payload: Append a malicious SQL fragment to the arttype parameter value (e.g., using UNION-based or time-based blind injection techniques) to extract data from the WordPress database.
5. Extract Sensitive Data: Use the injected query to retrieve tables such as wp_users (containing usernames and hashed passwords) or other sensitive database contents.
6. Post-Exploitation: Crack extracted password hashes offline or use extracted session tokens/credentials to escalate privileges or pivot further within the environment (Wordfence Advisory, WordPress Plugin Trac).

• Network: Unusual or repeated HTTP requests containing SQL metacharacters (e.g., ', --, UNION, SELECT) in the arttype parameter sent to plugin endpoints.
• Logs: WordPress or web server access logs showing requests to plugin-related PHP files (e.g., cfmw-positions.php) with anomalous parameter values or encoded SQL syntax; repeated requests from a single subscriber-level account.
• Database: Unexpected or high-volume database queries originating from the plugin's query context; queries referencing tables outside the plugin's normal scope (e.g., wp_users, wp_options).
• Application: New or unexpected subscriber accounts created shortly before suspicious activity; unusual data access patterns in WordPress audit logs.

Update the "CMS für Motorrad Werkstätten" plugin to a version newer than 1.0.0 as soon as a patched release is available. In the interim, restrict subscriber-level registration on the WordPress site to trusted users only, or disable the plugin entirely if it is not critical to operations. Site administrators should also implement a web application firewall (WAF) rule to block SQL injection attempts targeting the arttype parameter. Monitor database activity and access logs for signs of unauthorized data extraction (Github Advisory, Wordfence Advisory).

Wordfence included CVE-2026-6674 in their weekly WordPress vulnerability report for the period of April 20–26, 2026, as part of routine disclosure coverage (Wordfence Blog). The vulnerability received limited broader community attention given its niche plugin scope and moderate severity rating. No significant independent researcher commentary or major media coverage has been identified.