CVE-2025-31809 Overview
CVE-2025-31809 is a Cross-Site Request Forgery (CSRF) vulnerability in the Labinator Content Types Duplicator plugin for WordPress. The flaw affects all plugin versions up to and including 1.1.3. The vulnerability is categorized under CWE-352 and stems from missing or improper CSRF token validation on state-changing plugin actions. An attacker can craft a malicious web page that, when visited by an authenticated WordPress user, triggers unintended actions on the target site. Exploitation requires user interaction such as clicking a link or loading attacker-controlled content.
Critical Impact
An authenticated administrator lured to a malicious page can be forced to perform plugin actions without consent, resulting in limited integrity impact on the affected WordPress site.
Affected Products
- Labinator Content Types Duplicator WordPress plugin versions up to and including 1.1.3
- WordPress installations with the labinator-content-types-duplicator plugin enabled
- Sites where administrators or privileged users browse the web while authenticated to WordPress
Discovery Timeline
- 2025-04-01 - CVE-2025-31809 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-31809
Vulnerability Analysis
The Labinator Content Types Duplicator plugin fails to validate the origin and authenticity of state-changing HTTP requests. WordPress provides a nonce mechanism through wp_nonce_field() and check_admin_referer() to defend against CSRF. This plugin does not correctly implement or enforce these checks on the affected endpoints. As a result, requests originating from third-party sites are processed as if they came from the authenticated user's browser session.
The attack requires user interaction, meaning the victim must visit an attacker-controlled page or click a crafted link while authenticated to the target WordPress site. The scope is unchanged and confidentiality and availability are not directly affected, but attackers can cause limited integrity changes through the plugin's exposed actions.
Root Cause
The root cause is missing anti-CSRF token verification on plugin request handlers. WordPress plugins are expected to validate nonces on any handler that changes server-side state, such as duplicating content types, modifying settings, or triggering administrative actions. Without this check, the plugin trusts the browser's session cookie alone as proof of intent.
Attack Vector
Exploitation follows the standard CSRF pattern. An attacker hosts a page containing an auto-submitting HTML form or an image tag pointing to the vulnerable plugin endpoint on the target WordPress site. When an authenticated administrator visits the page, the browser attaches the WordPress session cookie to the outbound request. The plugin processes the request as legitimate because no nonce or referer check rejects it. The attacker cannot read the response due to same-origin policy, which is why confidentiality impact is rated none.
No verified public exploit code is available. See the Patchstack Vulnerability Advisory for additional technical details.
Detection Methods for CVE-2025-31809
Indicators of Compromise
- Unexpected duplicated content types, posts, or plugin configuration changes in the WordPress admin interface
- WordPress access log entries showing state-changing requests to labinator-content-types-duplicator endpoints with Referer headers pointing to external domains
- Administrative actions performed at times when the responsible administrator was not actively working in the WordPress dashboard
Detection Strategies
- Review WordPress audit logs and web server access logs for POST or GET requests to plugin admin URLs that lack expected nonce parameters
- Correlate administrator browsing telemetry with plugin action events to identify requests triggered by external referers
- Monitor for anomalous outbound plugin activity following administrator visits to unfamiliar sites or email links
Monitoring Recommendations
- Enable a WordPress activity logging plugin to record admin actions, including who performed them and from which IP address
- Configure a web application firewall (WAF) to flag or block requests to the plugin's admin endpoints that lack a same-origin Referer header
- Alert on any administrative changes originating from IP addresses that do not match known administrator locations
How to Mitigate CVE-2025-31809
Immediate Actions Required
- Disable the Labinator Content Types Duplicator plugin until a patched version is confirmed available and installed
- Restrict administrator accounts to dedicated browsers or sessions that are not used for general web browsing
- Audit recent plugin activity for unauthorized duplications or configuration changes
Patch Information
At the time of publication, the advisory lists affected versions from n/a through <= 1.1.3 with no fixed version specified. Site owners should monitor the Patchstack Vulnerability Advisory and the plugin's official page for an updated release that adds nonce validation to all state-changing handlers.
Workarounds
- Deactivate and remove the plugin if a patched version is not yet available
- Deploy WAF rules that require a matching same-origin Referer or Origin header for requests to /wp-admin/ endpoints associated with the plugin
- Limit administrator role assignment to the minimum number of users, reducing the pool of viable CSRF victims
- Use browser session isolation or dedicated administrative workstations to reduce exposure to attacker-controlled pages
# Example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate labinator-content-types-duplicator
wp plugin delete labinator-content-types-duplicator
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
