CVE-2025-68033 Overview
CVE-2025-68033 is a Sensitive Data Exposure vulnerability affecting the WordPress Custom Related Posts plugin developed by Brecht. The vulnerability allows unauthenticated attackers to retrieve embedded sensitive data from affected WordPress installations. This issue is classified under CWE-201 (Insertion of Sensitive Information Into Sent Data), indicating that the plugin improperly includes sensitive information in data that is transmitted to users.
Critical Impact
Unauthenticated attackers can remotely extract sensitive information from WordPress sites running vulnerable versions of the Custom Related Posts plugin, potentially exposing confidential data without requiring any user interaction.
Affected Products
- Custom Related Posts plugin versions from n/a through 1.8.0
- WordPress installations using the affected plugin versions
Discovery Timeline
- January 5, 2026 - CVE-2025-68033 published to NVD
- January 8, 2026 - Last updated in NVD database
Technical Details for CVE-2025-68033
Vulnerability Analysis
This vulnerability stems from improper handling of sensitive information within the Custom Related Posts plugin for WordPress. The plugin fails to properly sanitize or restrict access to data that is embedded within its responses, allowing unauthorized parties to retrieve sensitive information that should remain protected.
The network-based attack vector combined with no authentication requirements means that any remote attacker can exploit this vulnerability without needing valid credentials or user interaction. The confidentiality impact is rated high, indicating that significant sensitive data could be exposed, while integrity and availability remain unaffected as this is strictly an information disclosure issue.
Root Cause
The root cause is the insertion of sensitive information into data sent to users (CWE-201). The plugin includes information in its output or responses that should be restricted based on authorization levels. This design flaw allows the data to be accessible to parties who should not have permission to view it. WordPress plugins that handle related post functionality often process metadata and content that may contain sensitive details, and without proper access controls, this information can leak to unauthorized users.
Attack Vector
The attack can be executed remotely over the network without requiring authentication or any form of user interaction. An attacker targeting a vulnerable WordPress installation can craft requests to extract sensitive embedded data from the Custom Related Posts plugin's responses.
The exploitation process involves:
- Identifying WordPress sites running the Custom Related Posts plugin version 1.8.0 or earlier
- Sending crafted requests to the plugin's endpoints
- Parsing the responses to extract sensitive information that should not be publicly accessible
For detailed technical information about the exploitation mechanism, refer to the Patchstack Vulnerability Report.
Detection Methods for CVE-2025-68033
Indicators of Compromise
- Unusual or unexpected requests targeting Custom Related Posts plugin endpoints
- Anomalous data extraction patterns in web server access logs
- Requests from unknown IP addresses querying plugin-specific URLs
- Elevated volume of requests to related posts functionality
Detection Strategies
- Monitor web application firewall (WAF) logs for suspicious requests targeting the Custom Related Posts plugin
- Implement logging for all plugin endpoint access and review for anomalies
- Use WordPress security plugins to detect unauthorized data access attempts
- Deploy network-based intrusion detection systems (IDS) with rules for WordPress plugin exploitation
Monitoring Recommendations
- Enable detailed access logging for WordPress installations
- Configure alerts for bulk data extraction patterns from plugin endpoints
- Regularly audit plugin configurations and access controls
- Monitor for reconnaissance activity targeting WordPress plugin fingerprinting
How to Mitigate CVE-2025-68033
Immediate Actions Required
- Update the Custom Related Posts plugin to a patched version if available
- Temporarily disable the Custom Related Posts plugin until a fix is applied
- Review access logs for any evidence of prior exploitation
- Audit exposed data to assess potential breach impact
Patch Information
Organizations should check the Patchstack Vulnerability Report for the latest patch information and remediation guidance. Ensure all WordPress installations are updated to versions beyond 1.8.0 once a security fix is released by the plugin developer.
Workarounds
- Disable the Custom Related Posts plugin until a patched version is available
- Implement WAF rules to block suspicious requests to the plugin's endpoints
- Restrict access to WordPress admin and plugin directories via web server configuration
- Consider using alternative related posts plugins that are not affected by this vulnerability
# WordPress CLI - Deactivate vulnerable plugin
wp plugin deactivate custom-related-posts
# Verify plugin status
wp plugin list --status=active | grep custom-related-posts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
