CVE-2025-31552 Overview
CVE-2025-31552 is a critical SQL Injection vulnerability affecting the RSVPMarker WordPress plugin developed by davidfcarr. This vulnerability allows unauthenticated attackers to manipulate SQL queries through improper neutralization of special elements used in SQL commands (CWE-89). Successful exploitation could result in unauthorized access to sensitive database information and potential service disruption.
Critical Impact
Unauthenticated attackers can exploit this SQL Injection vulnerability to extract sensitive data from WordPress databases, potentially compromising user credentials, personal information, and site configuration data.
Affected Products
- RSVPMarker WordPress Plugin versions up to and including 11.4.8
- WordPress installations using vulnerable RSVPMarker versions
Discovery Timeline
- April 1, 2025 - CVE-2025-31552 published to NVD
- April 2, 2025 - Last updated in NVD database
Technical Details for CVE-2025-31552
Vulnerability Analysis
This SQL Injection vulnerability exists in the RSVPMarker WordPress plugin due to insufficient sanitization of user-supplied input before it is incorporated into SQL queries. The vulnerability is network-accessible and requires no authentication or user interaction to exploit. The scope is changed, meaning exploitation can affect resources beyond the vulnerable component itself, potentially impacting the entire WordPress database and associated services.
The attack allows unauthorized read access to highly sensitive database contents while also enabling limited denial of service capabilities through malicious query execution.
Root Cause
The root cause of CVE-2025-31552 is the failure to properly sanitize and validate user-controlled input before constructing SQL queries. The RSVPMarker plugin does not employ parameterized queries or adequate input filtering mechanisms, allowing attackers to inject malicious SQL syntax that alters the intended query logic.
Attack Vector
The vulnerability is exploitable over the network without requiring authentication. An attacker can craft malicious requests containing SQL injection payloads targeting vulnerable endpoints in the RSVPMarker plugin. Since no privileges are required and no user interaction is necessary, this vulnerability presents a significant risk to any WordPress site running affected versions.
The attack typically involves injecting SQL metacharacters and commands into plugin parameters, allowing the attacker to:
- Extract sensitive data from the WordPress database
- Enumerate database structure and table contents
- Potentially cause denial of service through resource-intensive queries
For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.
Detection Methods for CVE-2025-31552
Indicators of Compromise
- Unusual or malformed requests to RSVPMarker plugin endpoints containing SQL syntax characters such as single quotes, double dashes, or UNION SELECT statements
- Database error messages appearing in web server logs indicating SQL syntax errors
- Unexpected database queries or access patterns in MySQL/MariaDB logs
- Evidence of data exfiltration through time-based or error-based SQL injection techniques
Detection Strategies
- Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting WordPress plugins
- Monitor web server access logs for requests containing SQL injection indicators in query parameters
- Implement database activity monitoring to detect unusual query patterns or unauthorized data access
- Use WordPress security plugins that scan for known vulnerable plugin versions
Monitoring Recommendations
- Enable detailed logging for the RSVPMarker plugin and associated database queries
- Configure alerts for high-volume or unusual requests to WordPress plugin endpoints
- Monitor for sudden increases in database read operations or query execution times
- Review WordPress audit logs for signs of unauthorized data access or privilege escalation
How to Mitigate CVE-2025-31552
Immediate Actions Required
- Update RSVPMarker plugin to a patched version newer than 11.4.8 immediately
- If updates are not available, temporarily disable the RSVPMarker plugin until a patch is released
- Implement WAF rules to block SQL injection attempts targeting the plugin
- Review database access logs for evidence of prior exploitation
- Consider password resets for all users if compromise is suspected
Patch Information
Organizations should update the RSVPMarker WordPress plugin beyond version 11.4.8 to address this vulnerability. Consult the Patchstack Vulnerability Report for the latest patch information and remediation guidance.
Workarounds
- Disable the RSVPMarker plugin until a patched version is available
- Implement strict WAF rules to filter SQL injection patterns in incoming requests
- Restrict access to WordPress admin areas and plugin endpoints using IP allowlisting
- Apply database-level access controls to limit the potential impact of SQL injection attacks
- Consider using prepared statements at the application level if custom modifications are feasible
# WordPress CLI command to deactivate vulnerable plugin
wp plugin deactivate rsvpmaker
# Verify plugin status
wp plugin list --status=active | grep rsvpmaker
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
