CVE-2025-25166 Overview
CVE-2025-25166 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the InLocation WordPress plugin by gabrieldarezzo. The flaw affects all versions up to and including 1.8. When exploited, the CSRF weakness enables an attacker to inject stored Cross-Site Scripting (XSS) payloads into the application. Successful exploitation requires user interaction, such as an authenticated administrator visiting a malicious page. The stored payload then executes in the browser context of any user visiting the affected pages.
Critical Impact
Attackers can trick authenticated WordPress administrators into submitting crafted requests that inject persistent JavaScript into the InLocation plugin, leading to session theft, defacement, or further account takeover.
Affected Products
- gabrieldarezzo InLocation plugin for WordPress
- All versions from n/a through 1.8
- WordPress sites with the InLocation plugin enabled
Discovery Timeline
- 2025-02-07 - CVE-2025-25166 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-25166
Vulnerability Analysis
The InLocation plugin fails to validate the origin and authenticity of state-changing HTTP requests. Attackers exploit this omission by crafting a malicious page or link that triggers a privileged action when an authenticated user visits it. The forged request writes attacker-controlled input into the plugin's stored data. Because the input is not sanitized before being rendered, it executes as JavaScript in later page views. This chains a CSRF flaw with a stored XSS sink, expanding the impact beyond a typical single-user CSRF.
Root Cause
The root cause is the absence of anti-CSRF protections, such as WordPress nonces validated with check_admin_referer() or wp_verify_nonce(), on request handlers that persist plugin data. Compounding the issue, the stored data is echoed to the page without output encoding through functions such as esc_html() or esc_attr(). Either control alone would have blocked the attack chain.
Attack Vector
Exploitation is network-based and requires user interaction. An attacker hosts a page containing an auto-submitting form or fetch request targeting the vulnerable InLocation endpoint. When an authenticated administrator loads the attacker page, the browser sends the request with valid session cookies. The plugin accepts the request and stores the attacker's script. Any subsequent visitor to the affected view executes the payload in their browser session.
No verified public proof-of-concept code is available. See the Patchstack XSS Vulnerability Report for additional technical details.
Detection Methods for CVE-2025-25166
Indicators of Compromise
- Unexpected <script> tags or JavaScript event handlers stored in InLocation plugin database records or wp_options entries.
- WordPress admin sessions generating POST requests to InLocation endpoints with Referer headers pointing to external domains.
- Outbound browser traffic from administrator workstations to unfamiliar domains shortly after visiting third-party links.
Detection Strategies
- Audit the WordPress database for InLocation-managed fields containing HTML tags, javascript: URIs, or encoded script content.
- Inspect web server access logs for POST requests to InLocation admin handlers lacking the _wpnonce parameter.
- Correlate administrator authentication events with subsequent plugin configuration changes that occurred without an admin UI session.
Monitoring Recommendations
- Enable WordPress audit logging for plugin setting changes and administrator activity.
- Monitor outbound requests from browsers rendering WordPress admin pages for anomalous script-driven traffic.
- Alert on modifications to plugin data outside expected administrative workflows or maintenance windows.
How to Mitigate CVE-2025-25166
Immediate Actions Required
- Deactivate the InLocation plugin on all WordPress sites until a patched release is confirmed.
- Restrict WordPress admin access to trusted networks and enforce short session lifetimes.
- Require administrators to log out of WordPress before browsing untrusted sites.
Patch Information
No fixed version is listed in the advisory. The vulnerability affects InLocation through version 1.8. Site owners should monitor the Patchstack XSS Vulnerability Report and the plugin's WordPress.org page for a security release. If no update is published, remove the plugin and replace it with a maintained alternative.
Workarounds
- Remove the InLocation plugin from any WordPress installation where it is not actively required.
- Deploy a web application firewall rule that blocks requests to InLocation admin endpoints missing a valid _wpnonce value.
- Enforce a Content Security Policy that disallows inline scripts on WordPress admin and public pages served by the plugin.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
