EUVD-2026-44854
GHSA-3hjj-97jw-2f47
Severity by source
AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
PR:H for mandatory admin authentication; AC:H for the multisite-or-unfiltered_html-disabled constraint; S:C because injected scripts execute in other users' browsers.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The MxChat - AI Chatbot & Content Generation for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.2.10 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
AnalysisAI
Stored Cross-Site Scripting in the MxChat AI Chatbot & Content Generation WordPress plugin (versions up to and including 3.2.10) enables authenticated administrators to persist malicious scripts through admin settings panels. Exploitation is constrained to WordPress multi-site environments or single-site installs where the unfiltered_html capability has been explicitly disabled, narrowing the realistic attack surface significantly. No public exploit code or active exploitation (CISA KEV) has been identified; CVSS 4.4 Medium reflects the restricted conditions and high privilege requirement.
Technical ContextAI
The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation - Stored XSS). The affected CPE is cpe:2.3:a:mxchat:mxchat_-_ai_chatbot_&_content_generation_for_wordpress:*:*:*:*:*:*:*:*. Source references pinpoint three specific code locations in plugin version 3.2.10: includes/class-mxchat-admin.php at line 7811 (admin settings handler) and admin/class-ajax-handler.php at lines 145, 522, and 528 (AJAX endpoint handlers). These files accept administrator-supplied input into settings that are later rendered in page output without sufficient sanitization or output escaping, allowing injected scripts to execute in victim browsers when affected pages are loaded. WordPress's built-in unfiltered_html capability normally permits administrators to save raw HTML/JavaScript - the vulnerability only surfaces when this capability is explicitly removed (as is the case in multi-site networks where only super-admins hold this capability by default).
RemediationAI
Upstream fix available (WordPress plugin repository changeset at https://plugins.trac.wordpress.org/changeset?reponame=&old=3590075%40mxchat-basic&new=3590075%40mxchat-basic); a specific released patched version number is not confirmed in the available data - verify the current version in the WordPress plugin directory and update to any release beyond 3.2.10 once confirmed patched. As a compensating control pending upgrade, restrict administrator account access to the MxChat settings pages using a capability management plugin, or limit the number of accounts holding the administrator role to reduce the pool of potential attackers. In multi-site environments, auditing which users hold super-admin privileges is particularly important since those users retain unfiltered_html and are therefore not vulnerable to this specific attack path. Disabling the MxChat plugin entirely eliminates the attack surface if AI chatbot functionality is non-critical.
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External POC / Exploit Code
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