CVE-2025-39456 Overview
CVE-2025-39456 is a missing authorization vulnerability in the iTRON WP Logger plugin (wp-data-logger) for WordPress. The flaw affects all versions up to and including 2.2. The plugin fails to enforce proper access control checks, allowing authenticated users with low privileges to interact with functionality that should be restricted. The vulnerability is classified under [CWE-862] Missing Authorization and stems from incorrectly configured access control security levels within the plugin's request handlers.
Critical Impact
Authenticated attackers with low-level privileges can exploit incorrectly configured access controls to affect data integrity and availability within the WP Logger plugin.
Affected Products
- iTRON WP Logger plugin (wp-data-logger) versions up to and including 2.2
- WordPress installations running the vulnerable plugin
- Any site permitting low-privileged authenticated accounts (subscriber level or above)
Discovery Timeline
- 2025-04-17 - CVE-2025-39456 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-39456
Vulnerability Analysis
The WP Logger plugin exposes functionality that does not verify whether the requesting user holds the required capability or role. WordPress plugins typically enforce authorization through current_user_can() capability checks combined with nonce validation. The affected plugin handlers omit or misconfigure these checks, treating any authenticated session as sufficient authorization. As a result, an attacker with a valid low-privilege account can invoke plugin actions that should be restricted to administrators or higher-privileged roles. The impact is limited to partial loss of integrity and availability, with no direct confidentiality exposure indicated by the vendor description.
Root Cause
The root cause is a broken access control pattern classified as [CWE-862] Missing Authorization. The plugin's request handlers rely on authentication state alone rather than combining authentication with granular capability verification. This design assumes that authenticated users are trusted, which contradicts WordPress role separation principles where subscribers, contributors, and authors hold distinct permission boundaries.
Attack Vector
Exploitation requires network access to the WordPress site and a valid authenticated account with low privileges. The attacker sends crafted HTTP requests to plugin endpoints or admin-ajax actions exposed by wp-data-logger. Because the endpoints do not validate the caller's capabilities, the requests execute successfully. No user interaction is required beyond the attacker's own actions. Public exploitation code is not currently listed, and the CVE is not present on the CISA Known Exploited Vulnerabilities catalog.
No verified proof-of-concept code has been published. See the Patchstack Vulnerability Report for additional technical detail.
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Stop Identity AttacksDetection Methods for CVE-2025-39456
Indicators of Compromise
- Unexpected POST requests to wp-admin/admin-ajax.php referencing WP Logger actions from low-privileged user sessions
- Modification or deletion of logger data records without a corresponding administrator session
- Unusual authenticated request patterns from subscriber-tier accounts targeting plugin endpoints
Detection Strategies
- Audit WordPress access logs for authenticated requests to wp-data-logger endpoints originating from non-administrator accounts
- Enable WordPress security plugins that log capability checks and flag unauthorized action invocations
- Correlate plugin-related database writes with the acting user's role to identify privilege mismatches
Monitoring Recommendations
- Forward WordPress and web server logs to a centralized SIEM for behavioral analysis of authenticated user activity
- Alert on newly created low-privilege accounts followed by immediate plugin endpoint interaction
- Track version metadata for the wp-data-logger plugin across managed sites to identify unpatched instances
How to Mitigate CVE-2025-39456
Immediate Actions Required
- Identify all WordPress sites running the wp-data-logger plugin at version 2.2 or earlier
- Restrict user registration and audit existing low-privileged accounts for legitimacy
- Deactivate the WP Logger plugin until a patched release is available and verified
Patch Information
At the time of publication, the vendor advisory referenced by Patchstack indicates the vulnerability affects versions up to and including 2.2. Administrators should consult the plugin's official page for a fixed release and upgrade immediately when available. If no patch has been published, removal is the safest option.
Workarounds
- Deactivate and remove the wp-data-logger plugin from all affected WordPress installations
- Apply Web Application Firewall (WAF) rules that block unauthenticated and low-privilege requests to WP Logger endpoints
- Enforce least-privilege role assignments and disable open user registration where feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
