CVE-2026-85348 Overview
CVE-2026-85348 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the GDPR Data Request Form WordPress plugin through version 1.7.1. The plugin fails to implement CSRF protection when updating one of its settings. An attacker can craft a forged request that modifies the setting if a site administrator is tricked into clicking a malicious link while authenticated. The flaw requires user interaction and does not expose confidential data, but it allows unauthorized modification of plugin configuration.
Critical Impact
Attackers can modify plugin settings on affected WordPress sites by tricking an authenticated administrator into visiting an attacker-controlled page.
Affected Products
- GDPR Data Request Form WordPress plugin, versions through 1.7.1
Discovery Timeline
- 2026-10-09 - CVE-2026-85348 published to NVD
- 2026-10-09 - Last updated in NVD database
Technical Details for CVE-2026-85348
Vulnerability Analysis
The GDPR Data Request Form plugin exposes a settings update handler that does not verify the origin of incoming requests. WordPress provides nonce tokens through wp_nonce_field() and check_admin_referer() for exactly this purpose, but the vulnerable code path omits that validation. An attacker who hosts a page containing a crafted HTML form or JavaScript request can submit state-changing input to the WordPress administrator's session. The browser automatically attaches the administrator's authentication cookies, and the plugin processes the request as legitimate.
The impact is limited to integrity of plugin settings. The CSRF scope does not expose stored data or affect site availability directly, but modified settings may influence how data subject requests are handled under GDPR workflows.
Root Cause
The root cause is missing CSRF token validation on a settings update endpoint. The handler trusts the authenticated session cookie as the sole authorization signal, violating the WordPress security guidance to pair capability checks with nonce verification for every state-changing admin action.
Attack Vector
Exploitation requires an attacker to lure an authenticated WordPress administrator to a page under attacker control. The page issues a forged POST or GET request to the vulnerable settings endpoint. No credentials, privileges, or prior access on the target site are required by the attacker. The administrator's browser performs the request, and the plugin applies the change silently. The current EPSS score is 0.098% (percentile 0.728) as of 2026-10-16, reflecting low observed exploitation activity.
No public proof-of-concept code is available. See the WPScan Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-85348
Indicators of Compromise
- Unexpected changes to GDPR Data Request Form plugin settings without a corresponding administrator-initiated session in audit logs.
- HTTP referer headers in web server logs pointing to external, unknown domains for wp-admin POST requests targeting the plugin's settings page.
- Admin-area requests arriving without an accompanying _wpnonce parameter on endpoints that should require one.
Detection Strategies
- Review WordPress audit logs or install a plugin that records settings changes with user, timestamp, and source IP.
- Compare current plugin configuration against a known-good baseline on a scheduled basis.
- Monitor web access logs for cross-origin POST requests to /wp-admin/admin.php or /wp-admin/options.php tied to the GDPR plugin's option names.
Monitoring Recommendations
- Alert on plugin configuration changes outside maintenance windows.
- Track administrator browsing patterns for interactions with unknown external domains preceding admin-area activity.
- Enable WordPress debug logging for the plugin's settings handler during triage.
How to Mitigate CVE-2026-85348
Immediate Actions Required
- Audit the current configuration of the GDPR Data Request Form plugin and confirm settings match the expected values.
- Restrict administrator browsing habits and avoid clicking untrusted links while authenticated to WordPress admin.
- Consider temporarily deactivating the plugin on high-value sites until a patched version is confirmed available.
Patch Information
At the time of publication, the advisory describes the plugin as vulnerable through version 1.7.1. Monitor the WPScan Vulnerability Report and the official plugin page for a fixed release that adds nonce verification to the affected settings handler. Update to the patched version as soon as it is released.
Workarounds
- Deploy a Web Application Firewall (WAF) rule that requires a valid Referer or Origin header matching the site domain for POST requests to the plugin's settings endpoint.
- Enforce browser-level protections such as SameSite=Lax or SameSite=Strict on WordPress authentication cookies to reduce CSRF exposure.
- Limit administrator accounts to the smallest set of users possible, and use separate browser profiles for WordPress administration.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
