CVE-2025-31798 Overview
CVE-2025-31798 is a missing authorization vulnerability in the Publitio WordPress plugin. The flaw affects all versions up to and including 2.1.8. Attackers with low-privilege authenticated access can abuse incorrectly configured access control checks to perform actions that should require higher privileges. The weakness maps to CWE-862: Missing Authorization.
Critical Impact
Authenticated low-privilege users can bypass authorization checks in the Publitio plugin and perform restricted operations, potentially modifying plugin state or media assets managed by the integration.
Affected Products
- Publitio WordPress plugin versions up to and including 2.1.8
- WordPress sites with the Publitio media integration enabled
- Any environment that permits subscriber-level or contributor-level account registration on affected installations
Discovery Timeline
- 2025-04-01 - CVE-2025-31798 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-31798
Vulnerability Analysis
The Publitio plugin integrates WordPress with the Publitio media management service. Several of its endpoints lack proper capability or nonce verification. An authenticated attacker with minimal privileges can invoke these endpoints directly and trigger actions reserved for higher-privilege roles.
The issue is a broken access control pattern rather than a code execution flaw. Successful exploitation does not grant arbitrary code execution, but it allows unauthorized interaction with plugin functionality. The attack is remote and requires only network access to the WordPress site plus valid low-privilege credentials.
Root Cause
The root cause is missing authorization logic in plugin request handlers. Affected handlers do not call current_user_can() with an appropriate capability check, or they rely on authentication alone to gate privileged operations. This design assumes any authenticated user is trustworthy, which violates the principle of least privilege.
Attack Vector
Exploitation requires an authenticated session on the target WordPress site. The attacker sends crafted HTTP requests to vulnerable plugin endpoints, typically through the WordPress AJAX interface (admin-ajax.php) or REST routes exposed by the plugin. Because the endpoints lack role verification, the server processes the request as if an administrator had issued it.
For technical specifics, see the Patchstack Vulnerability Report.
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Stop Identity AttacksDetection Methods for CVE-2025-31798
Indicators of Compromise
- Unexpected POST requests to Publitio plugin AJAX actions from accounts with subscriber or contributor roles
- Modifications to Publitio plugin settings or linked media assets without a corresponding administrator session
- New or altered media entries in the Publitio dashboard that do not match WordPress editor activity logs
Detection Strategies
- Review web server access logs for requests to admin-ajax.php containing Publitio action parameters originating from low-privilege user sessions
- Correlate WordPress audit logs with Publitio API logs to identify operations performed outside of administrator workflows
- Alert on authenticated users invoking plugin endpoints they would not normally access during routine use
Monitoring Recommendations
- Enable a WordPress activity logging plugin that records role, IP address, and endpoint for every authenticated request
- Forward WordPress and web server logs to a centralized SIEM for role-based anomaly analysis
- Monitor for sudden increases in requests to Publitio plugin routes following new user registrations
How to Mitigate CVE-2025-31798
Immediate Actions Required
- Update the Publitio plugin to a version released after 2.1.8 once the vendor publishes a fix
- Audit all WordPress accounts and disable or remove unused low-privilege users
- Disable the Publitio plugin on affected sites if a patched version is not yet available
Patch Information
At the time of publication, affected versions are documented as <= 2.1.8. Administrators should consult the Patchstack Vulnerability Report and the plugin's WordPress.org listing for the latest patched release and apply it across all sites.
Workarounds
- Restrict new user registration on affected WordPress sites to prevent attackers from obtaining the authenticated session required for exploitation
- Place the WordPress admin surface behind a web application firewall rule that enforces role-based access to Publitio plugin endpoints
- Rotate Publitio API credentials after patching to invalidate any tokens that may have been exposed through unauthorized actions
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
