# MxChat <= 3.2.25 - Unauthenticated Stored Cross-Site Scripting via Rating Feedback

- **ID:** WPSEC-2026-1226
- **Plugin:** MxChat – AI Chatbot & Content Generation for WordPress (`mxchat-basic`), https://wordpress.org/plugins/mxchat-basic/
- **Affected versions:** all versions before 3.2.26
- **Fixed in:** 3.2.26 (Update to 3.2.26 or later.)
- **Severity:** High 7.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-18)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/mxchat-basic
- **Fix released:** 2026-10-17
- **Published:** 2026-10-18
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1226/

## Description

The MxChat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the public chat rating feedback in all versions up to, and including, 3.2.25. This is due to insufficient output escaping: visitor feedback was placed into an HTML title attribute on the Transcripts screen without escaping quotes. The rating handler also accepted feedback for any session ID and let existing feedback be overwritten. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever an administrator views the chat transcripts.

## References

- https://wpsec.com/vuln/WPSEC-2026-1226/
- https://plugins.svn.wordpress.org/mxchat-basic/tags/3.2.26/
- https://wordpress.org/plugins/mxchat-basic/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1226/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.