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Vulnerability record · CVE-2026-13731 · published 1 July 2026

CVE-2026-13731: Cross-site scripting vulnerability

The WPBot – AI ChatBot for Live Support, Lead Generation, AI Services plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'conversation' parameter in all versions up to, and including, 8.4.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The AJAX nonce required to authenticate the save request is publicly emitted on every frontend page via wp_localize_script, making it freely obtainable by any anonymous visitor and removing any practical barrier to exploitation.

7.2 CVSS 3.1 High EPSS 0.89% · top 42.3% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
1 Jul 2026Last modified by NVD

Description

The WPBot – AI ChatBot for Live Support, Lead Generation, AI Services plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'conversation' parameter in all versions up to, and including, 8.4.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The AJAX nonce required to authenticate the save request is publicly emitted on every frontend page via wp_localize_script, making it freely obtainable by any anonymous visitor and removing any practical barrier to exploitation.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/chatbot/tags/8.4.9/functions.php#L1811
https://plugins.trac.wordpress.org/browser/chatbot/tags/8.4.9/includes/chat-sessions/reports/view/partials/view-single-c
https://plugins.trac.wordpress.org/browser/chatbot/tags/8.4.9/includes/chat-sessions/wpbot-chat-sessions.php#L509
https://plugins.trac.wordpress.org/browser/chatbot/tags/8.4.9/includes/chat-sessions/wpbot-chat-sessions.php#L644
https://plugins.trac.wordpress.org/browser/chatbot/tags/8.4.9/qcld-wpwbot.php#L603
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3591600%40chatbot&new=3591600%40chatbot
https://www.wordfence.com/threat-intel/vulnerabilities/id/124f2b72-d8da-46ba-844f-e9cc01441702?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-13731), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.