CVE-2025-30883 Overview
CVE-2025-30883 is a Missing Authorization vulnerability [CWE-862] in the richplugins Trust.Reviews WordPress plugin (fb-reviews-widget). The flaw stems from incorrectly configured access control security levels, allowing authenticated users with low privileges to perform actions that should require higher authorization. The issue affects all versions of Trust.Reviews up to and including version 2.3.
Critical Impact
An authenticated attacker with low-level privileges can exploit broken access control over the network to affect the integrity of plugin data without requiring user interaction.
Affected Products
- richplugins Trust.Reviews (fb-reviews-widget) WordPress plugin
- All versions from n/a through <= 2.3
- WordPress sites with the vulnerable plugin installed and activated
Discovery Timeline
- 2025-03-27 - CVE-2025-30883 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-30883
Vulnerability Analysis
The Trust.Reviews plugin exposes functionality through WordPress endpoints without properly verifying the caller's authorization level. The plugin appears to rely on authentication alone rather than validating whether the authenticated user has the specific role or capability required to invoke the protected action. This design pattern maps to [CWE-862: Missing Authorization].
Exploitation requires the attacker to hold a valid low-privilege account, such as a subscriber, on the target WordPress site. Because impact is limited to integrity, an attacker can modify plugin-controlled data or settings but cannot directly read confidential information or take the site offline through this flaw alone. The EPSS probability sits at 0.388%, reflecting low observed exploitation activity in the wild.
Root Cause
The plugin fails to enforce capability checks (current_user_can()) or nonce validation on one or more action handlers. WordPress plugins commonly protect state-changing endpoints with both a capability check and a nonce; when either is missing, any authenticated user can trigger the handler. See the Patchstack Vulnerability Report for advisory-level detail.
Attack Vector
The attack is executed over the network against the WordPress admin-ajax or REST endpoint exposed by the plugin. An attacker registers or compromises a low-privilege account, authenticates to the site, and issues a crafted HTTP request to the vulnerable handler. No user interaction from an administrator is required, and the request executes with the attacker's session.
No public proof-of-concept exploit is currently available for CVE-2025-30883. Refer to the vendor advisory linked in the references for technical details.
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Stop Identity AttacksDetection Methods for CVE-2025-30883
Indicators of Compromise
- Unexpected modifications to Trust.Reviews plugin settings, review content, or associated post metadata.
- Requests to wp-admin/admin-ajax.php or plugin REST routes from accounts with subscriber or contributor roles.
- New or altered review widget configurations that were not initiated by an administrator.
Detection Strategies
- Audit WordPress access logs for POST requests to fb-reviews-widget endpoints originating from non-administrative session cookies.
- Compare current plugin option values in wp_options against a known-good baseline to identify unauthorized changes.
- Monitor for anomalous account creation followed shortly by requests targeting the plugin's AJAX or REST actions.
Monitoring Recommendations
- Enable WordPress activity logging to record capability-check failures and privileged plugin actions.
- Forward web server and application logs to a centralized SIEM for correlation across authentication and plugin activity events.
- Alert on spikes of authenticated requests to plugin endpoints from low-privilege accounts.
How to Mitigate CVE-2025-30883
Immediate Actions Required
- Update the Trust.Reviews plugin to a version later than 2.3 as soon as the vendor publishes a fix.
- Review all WordPress user accounts and remove untrusted subscriber or contributor accounts.
- Disable open user registration on sites that do not require it to reduce the pool of accounts eligible to exploit the flaw.
Patch Information
At the time of the last NVD update, the advisory lists affected versions through 2.3 with no fixed version indicated in the enriched data. Monitor the Patchstack Vulnerability Report and the plugin's changelog on WordPress.org for a patched release.
Workarounds
- Deactivate and remove the Trust.Reviews plugin until a patched version is released if the functionality is not essential.
- Restrict access to wp-admin/admin-ajax.php and plugin REST routes at the web application firewall (WAF) layer for non-administrative accounts.
- Apply a virtual patch through a WAF rule that blocks unauthorized calls to the plugin's action handlers.
# Example: temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate fb-reviews-widget
wp plugin status fb-reviews-widget
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
