CVE-2025-54020 Overview
CVE-2025-54020 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the Erik AntiSpam for Contact Form 7 (cf7-antispam) WordPress plugin. The flaw affects all plugin versions up to and including 0.6.3. An attacker can trick an authenticated user into submitting a forged request that performs unintended actions within the plugin. Exploitation requires user interaction, typically by luring a victim to a malicious page while authenticated to the target WordPress site.
Critical Impact
Successful exploitation allows attackers to perform unauthorized state-changing actions in the plugin context, resulting in low-level integrity and availability impact on affected WordPress sites.
Affected Products
- Erik AntiSpam for Contact Form 7 (cf7-antispam) plugin
- All versions from n/a through 0.6.3
- WordPress installations using the vulnerable plugin
Discovery Timeline
- 2025-07-16 - CVE-2025-54020 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-54020
Vulnerability Analysis
The vulnerability stems from missing or inadequate anti-CSRF protections in the cf7-antispam plugin. WordPress plugins must validate nonces on state-changing requests to prevent forged submissions. The plugin fails to enforce this validation on affected endpoints. An attacker exploits this weakness by crafting a malicious web page or link. When an authenticated administrator or privileged user visits the page, the browser automatically submits a request to the WordPress site using the victim's session cookies.
The attack requires user interaction, aligning with the CVSS User Interaction Required condition. No prior authentication is required for the attacker, but the victim must hold an active session on the target site. The confidentiality impact is none, while integrity and availability are affected at a low level.
Root Cause
The root cause is the absence of proper CSRF token validation on plugin actions. WordPress provides wp_nonce_field() and check_admin_referer() functions to mitigate CSRF, but the vulnerable code paths in cf7-antispam do not verify these tokens before executing sensitive operations.
Attack Vector
An attacker hosts a malicious page containing a hidden form or JavaScript that auto-submits to the vulnerable plugin endpoint. The victim, authenticated to the WordPress admin panel, visits the page. The browser sends the forged request with valid session cookies, and the plugin processes it as legitimate. This delivers unauthorized configuration changes or state modifications on the target site.
See the Patchstack Vulnerability Advisory for the disclosure details.
Detection Methods for CVE-2025-54020
Indicators of Compromise
- Unexpected configuration changes within the cf7-antispam plugin settings
- Web server access logs showing POST requests to plugin endpoints with external Referer headers
- Administrative actions originating from unusual IP addresses or browser sessions
Detection Strategies
- Review WordPress audit logs for plugin setting modifications lacking corresponding admin UI activity
- Inspect HTTP requests for missing or invalid _wpnonce parameters on plugin admin actions
- Correlate plugin state changes with concurrent user browsing history where feasible
Monitoring Recommendations
- Enable a WordPress activity log plugin to track administrative actions and plugin configuration changes
- Monitor referrer headers on admin endpoints and alert on cross-origin submissions
- Track EPSS updates and vulnerability advisories for cf7-antispam to detect emerging exploitation trends
How to Mitigate CVE-2025-54020
Immediate Actions Required
- Update the Erik AntiSpam for Contact Form 7 plugin to a version newer than 0.6.3 once available
- Audit WordPress administrator accounts and enforce least privilege on plugin management capabilities
- Log out administrative sessions after use and avoid browsing untrusted sites while authenticated to WordPress admin
Patch Information
At the time of publication, the vendor advisory listed on Patchstack tracks the CSRF issue affecting versions through 0.6.3. Administrators should monitor the plugin repository for a security release and apply it promptly.
Workarounds
- Deactivate the cf7-antispam plugin until a patched version is installed
- Deploy a Web Application Firewall (WAF) rule to block cross-origin POST requests to /wp-admin/ endpoints related to the plugin
- Require re-authentication for administrative sessions and enforce SameSite=Lax or Strict cookies where supported
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
