CVE-2025-23813 Overview
CVE-2025-23813 is a reflected cross-site scripting (XSS) vulnerability in the Tony Hayes Guten Free Options WordPress plugin. The flaw affects all versions of guten-free-options up to and including 0.9.7. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79].
Attackers can craft malicious URLs that, when clicked by an authenticated WordPress user, execute arbitrary JavaScript in the victim's browser context. Successful exploitation can lead to session theft, administrative action hijacking, or redirection to attacker-controlled infrastructure. The vulnerability requires user interaction but no privileges to exploit.
Critical Impact
Reflected XSS in the Guten Free Options plugin allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser through crafted links, with a scope change that can affect WordPress administrative sessions.
Affected Products
- Tony Hayes Guten Free Options (guten-free-options) WordPress plugin
- All versions from initial release through 0.9.7
- WordPress installations with the plugin enabled
Discovery Timeline
- 2025-03-03 - CVE-2025-23813 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-23813
Vulnerability Analysis
The Guten Free Options plugin fails to sanitize and escape user-supplied input before reflecting it back in HTTP responses. An attacker crafts a URL containing JavaScript payloads in vulnerable parameters. When a victim visits the link, the unsanitized input renders as executable script in the response page.
The vulnerability carries an EPSS score of 0.346% with a percentile of 57.278, indicating moderate likelihood of exploitation activity. Because the attack scope is changed, malicious script executes with the privileges of the browsing user, including any active WordPress administrator session. No public proof-of-concept exploit is currently listed in the Patchstack Vulnerability Report.
Root Cause
The plugin does not apply WordPress sanitization functions such as esc_html(), esc_attr(), or sanitize_text_field() to request parameters before echoing them into rendered HTML. This direct reflection of attacker-controlled data into the response constitutes the [CWE-79] weakness.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker delivers a crafted URL through phishing emails, social media, forum posts, or compromised websites. When an authenticated WordPress user with the plugin installed clicks the link, the reflected payload executes in their browser. The attacker can then steal session cookies, perform actions on behalf of the victim, or inject content into the WordPress administrative interface.
No exploitation code is publicly available. The vulnerability mechanism follows the standard reflected XSS pattern documented in the Patchstack advisory.
Detection Methods for CVE-2025-23813
Indicators of Compromise
- HTTP requests to WordPress endpoints containing <script>, javascript:, onerror=, or onload= patterns in query parameters
- Server access logs showing URL-encoded JavaScript payloads targeting the guten-free-options plugin paths
- Unexpected outbound requests from administrator browsers to unfamiliar domains after clicking external links
- Browser console errors or warnings related to Content Security Policy violations on plugin-rendered pages
Detection Strategies
- Inspect web server access logs for suspicious query string content directed at the plugin's request handlers
- Deploy web application firewall (WAF) rules to flag reflected XSS payload signatures targeting WordPress plugin parameters
- Monitor for anomalous administrator behavior, such as unexpected privilege changes or content modifications
- Correlate phishing email indicators with subsequent administrator clicks on external URLs
Monitoring Recommendations
- Enable verbose logging on the WordPress site, including all request parameters processed by active plugins
- Forward web server and WordPress audit logs to a centralized SIEM for analysis and retention
- Implement Content Security Policy (CSP) headers and monitor browser violation reports for inline script execution attempts
- Track plugin version inventory across WordPress installations to identify unpatched instances of guten-free-options
How to Mitigate CVE-2025-23813
Immediate Actions Required
- Identify all WordPress installations running the Guten Free Options plugin at version 0.9.7 or earlier
- Disable or remove the plugin until a patched version is released by the maintainer
- Force password resets and session invalidation for administrators who may have clicked untrusted links
- Review WordPress audit logs for unauthorized administrative actions during the exposure window
Patch Information
No fixed version has been published at the time of the NVD entry. The Patchstack advisory lists versions through 0.9.7 as affected. Administrators should monitor the Patchstack Vulnerability Report and the plugin repository for an official update.
Workarounds
- Remove the guten-free-options plugin from production WordPress installations until a fixed release is available
- Deploy a web application firewall with rules blocking reflected XSS payloads targeting plugin endpoints
- Implement strict Content Security Policy headers to prevent inline script execution on WordPress pages
- Train administrators to avoid clicking unsolicited links to WordPress URLs and to verify URL parameters before navigation
# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate guten-free-options
wp plugin delete guten-free-options
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
