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CVE-2026-13731— WPBot <= 8.4.9 - Unauthenticated Stored Cross-Site Scripting via 'conversation' Parameter

Quick assessment

Affected
quantumcloud WPBot – AI ChatBot for Live Support, Lead Generation, AI Services
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

quantumcloud wpbot是quantumcloud个人开发者开源的一款WordPress聊天机器人。 QuantumCloud WPBot 8.4.9及之前版本存在跨站脚本漏洞，该漏洞源于输入清理和输出转义不足，通过'conversation'参数存在存储型跨站脚本漏洞，可能导致未经身份验证的攻击者在页面中注入任意Web脚本，当用户访问被注入的页面时即会执行。

CVSS 7.2 · High EPSS 0.66% · P48

Public Exploits 1

Nuclei · 1 CVE-2026-13731.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
quantumcloud WPBot – AI ChatBot for Live Support, Lead Generation, AI Services ≤ 8.4.9 affected
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I. Basic Information for CVE-2026-13731

Vulnerability Information
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Vulnerability Title
WPBot <= 8.4.9 - Unauthenticated Stored Cross-Site Scripting via 'conversation' Parameter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
QuantumCloud WPBot 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
quantumcloud wpbot是quantumcloud个人开发者开源的一款WordPress聊天机器人。 QuantumCloud WPBot 8.4.9及之前版本存在跨站脚本漏洞，该漏洞源于输入清理和输出转义不足，通过'conversation'参数存在存储型跨站脚本漏洞，可能导致未经身份验证的攻击者在页面中注入任意Web脚本，当用户访问被注入的页面时即会执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
quantumcloud WPBot – AI ChatBot for Live Support, Lead Generation, AI Services 0 ~ 8.4.9 -

II. Public POCs for CVE-2026-13731

# POC Description Source Link Shenlong Link
1 WPBot <= 8.4.9 is vulnerable to stored cross-site scripting via the conversation parameter in the qcld_wb_chatbot_conversation_save AJAX action. The AJAX nonce (qcsecretbotnonceval123qc) is publicly emitted on every frontend page via wp_localize_script under the ajax_nonce key, making it freely obtainable by unauthenticated visitors. The conversation parameter is saved to the database without sanitization and rendered unsanitized in the admin chat session view, causing stored XSS that executes when an administrator views saved chat sessions. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-13731.yaml POC Details
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III. Intelligence Information for CVE-2026-13731

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Patches & Fixes for CVE-2026-13731 (1)

Other References for CVE-2026-13731 (1)

IV. Related Vulnerabilities

Same product: WPBot – AI ChatBot for Live Support, Lead Generation, AI Services
Same vendor: quantumcloud
Same weakness: CWE-79

V. Comments for CVE-2026-13731

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