CVE-2026-13731 json
WPBot <= 8.4.9 - Unauthenticated Stored Cross-Site Scripting via 'conversation' Parameter
published 4mo ago modified 4mo ago also EUVD-2026-40889
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template WPBot <= 8.4.9 - Cross-Site Scripting nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- quantumcloud WPBot – AI ChatBot for Live Support, Lead Generation, AI Services
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/124f2b72-d8da-46ba-844f-e9cc01441702?source=cve
- plugins.trac.wordpress.org /browser/chatbot/tags/8.4.9/includes/chat-sessions/reports/view/partials/view-single-chat.php#L148
- plugins.trac.wordpress.org /browser/chatbot/tags/8.4.9/includes/chat-sessions/wpbot-chat-sessions.php#L509
- plugins.trac.wordpress.org /browser/chatbot/tags/8.4.9/includes/chat-sessions/wpbot-chat-sessions.php#L644
- plugins.trac.wordpress.org /browser/chatbot/tags/8.4.9/functions.php#L1811
- plugins.trac.wordpress.org /browser/chatbot/tags/8.4.9/qcld-wpwbot.php#L603
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3591600%40chatbot&new=3591600%40chatbot&sfp_email=&sfph_mail=
Sources
- CVE List CVE-2026-13731
- NVD CVE-2026-13731
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.