CVE-2026-13731: WPBot <= 8.4.9 - Unauthenticated Stored Cross-Site Scripting via 'conversation' Parameter
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 wplocalizescript, making it freely obtainable by any anonymous visitor and removing any practical barrier to exploitation.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
WordPress plugin: WPBot – AI ChatBot for Live Support, Lead Generation, AI Servicesto a version that resolves this vulnerability.Fixed in 8.4.9 - Configuration
Fix the stored XSS by ensuring the 'conversation' parameter is properly sanitized on input and escaped on output (vulnerable in all versions up to and including 8.4.9).
WPBot plugin conversation parameter handling = input sanitization and output escaping - Compensating control
Mitigate exploitation by ensuring the AJAX nonce used to authenticate save requests is not publicly emitted on frontend pages (e.g., avoid exposing nonces via wp_localize_script to anonymous visitors); require nonce exposure only to authenticated/authorized contexts so unauthenticated users cannot obtain it.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-13731?
The severity of CVE-2026-13731 is high with a score of 7.2.
How do I fix CVE-2026-13731?
To fix CVE-2026-13731, update the WPBot plugin to a version later than 8.4.9.
What is the impact of CVE-2026-13731?
CVE-2026-13731 allows for unauthenticated stored cross-site scripting, potentially leading to malicious script execution.
Which applications are affected by CVE-2026-13731?
CVE-2026-13731 affects all versions of the WPBot plugin up to and including 8.4.9.
What type of vulnerability is CVE-2026-13731?
CVE-2026-13731 is classified as a stored cross-site scripting (XSS) vulnerability.