CVE-2025-57946 Overview
CVE-2025-57946 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the Loc Bui payOS plugin for WordPress. The flaw exists in all versions up to and including 1.0.73. Attackers can trick authenticated users into submitting unintended requests to the plugin, resulting in limited integrity and availability impact on the affected site. Exploitation requires user interaction, typically through a malicious link or crafted web page. The vulnerability was published to the National Vulnerability Database on September 22, 2025.
Critical Impact
Attackers can perform unauthorized state-changing actions on behalf of authenticated WordPress users of the payOS plugin, affecting site integrity and availability.
Affected Products
- Loc Bui payOS plugin for WordPress
- All versions from initial release through 1.0.73
- WordPress installations with the payOS plugin enabled
Discovery Timeline
- 2025-09-22 - CVE-2025-57946 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-57946
Vulnerability Analysis
The payOS plugin fails to implement adequate CSRF protection on one or more state-changing endpoints. WordPress provides nonce mechanisms through wp_nonce_field() and check_admin_referer() to prevent forged requests, but the affected plugin does not validate these tokens correctly on sensitive actions. As a result, an attacker who lures an authenticated user to a malicious page can trigger requests to the plugin that the browser will submit with the victim's active session cookies.
The flaw carries limited confidentiality impact but can modify plugin data and disrupt availability. Exploitation requires user interaction, which reduces the practical attack surface compared to unauthenticated remote flaws.
Root Cause
The root cause is missing or insufficient anti-CSRF token validation on plugin request handlers. Without a per-session nonce check, the plugin cannot distinguish between a legitimate request originating from its own admin interface and one forged by an external site. This aligns with CWE-352: Cross-Site Request Forgery.
Attack Vector
An attacker crafts a malicious HTML page containing an auto-submitting form or image tag targeting a vulnerable payOS endpoint. When an authenticated WordPress administrator or privileged user visits the attacker-controlled page, the browser attaches the victim's session cookies and submits the request. The plugin processes the request as legitimate. See the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2025-57946
Indicators of Compromise
- Unexpected changes to payOS plugin configuration or payment settings that no administrator initiated
- HTTP POST requests to payOS endpoints with Referer headers pointing to external domains
- Requests to plugin admin actions lacking the standard WordPress _wpnonce parameter
Detection Strategies
- Review WordPress access logs for administrative requests originating from cross-origin referrers
- Correlate authenticated user sessions with unexpected plugin configuration changes in the WordPress audit trail
- Monitor for outbound clicks from administrator accounts to untrusted domains preceding plugin state changes
Monitoring Recommendations
- Enable a WordPress audit logging plugin to capture all plugin configuration and settings changes
- Alert on modifications to payment gateway settings outside of scheduled change windows
- Track HTTP request patterns to /wp-admin/admin.php and /wp-admin/admin-ajax.php endpoints tied to the payOS plugin
How to Mitigate CVE-2025-57946
Immediate Actions Required
- Identify all WordPress sites running the payOS plugin at version 1.0.73 or earlier
- Upgrade to a fixed version once released by the vendor, per the Patchstack advisory
- Restrict administrative access to trusted networks and require re-authentication for sensitive plugin actions
- Educate administrators to log out of WordPress sessions before browsing untrusted sites
Patch Information
At the time of publication, users should consult the Patchstack Vulnerability Report for the latest patch availability. If no fixed version is available, disable the plugin until a patched release is published by Loc Bui.
Workarounds
- Temporarily deactivate the payOS plugin on production sites until a patched version is confirmed
- Deploy a Web Application Firewall (WAF) rule that enforces Referer and Origin header validation on payOS request handlers
- Require administrators to use dedicated browser profiles for WordPress management to limit cross-site request exposure
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
