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CVE-2026-118071— Joinchat 6.3.2 - 6.4.1 - Author+ Stored XSS via Button Block Message Attribute

Quick assessment

Affected
Unknown Joinchat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 6.4.2 版本之前的 Joinchat WordPress 插件中，其按钮区块的消息内容在输出到前端的 HTML 属性时未进行转义处理，这可能导致拥有“作者”（Author）及以上权限的用户对包括管理员在内的任何帖子访客发起存储型跨站脚本（Stored XSS）攻击。

AI Predicted 6.5 Difficulty: Easy EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Joinchat 6.3.2< 6.4.2 affected
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I. Basic Information for CVE-2026-118071

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Joinchat 6.3.2 - 6.4.1 - Author+ Stored XSS via Button Block Message Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Joinchat WordPress plugin before 6.4.2 does not escape the message of its button block before outputting it in an HTML attribute on the front end, which could allow users with the Author role and above to perform Stored Cross-Site Scripting attacks against any visitor of the post, including administrators.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Joinchat 6.3.2 ~ 6.4.2 -

II. Public POCs for CVE-2026-118071

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-118071

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Same Patch Batch · Unknown · 2026-10-30 · 12 CVEs total

CVE-2026-111578 7.5 HIGH PDF Invoices & Packing Slips for WooCommerce 5.16.2 - 5.16.4 - Unauthenticated Stored XSS
CVE-2026-117572 WP Visitor Statistics (Real Time Traffic) < 8.8 - Admin+ SQLi via 'order' Parameter
CVE-2026-118101 BuddyForms < 2.10.1 - Subscriber+ Arbitrary Post Modification
CVE-2026-118100 BuddyForms < 2.10.3 - Unauthenticated Form Configuration Disclosure
CVE-2026-118072 Fraud Prevention For WooCommerce and EDD < 2.3.6 - Subscriber+ Arbitrary Customer Blacklis
CVE-2026-118165 Firelight Lightbox < 2.3.23 - Contributor+ Stored XSS via Lightbox Link 'href' Attribute
CVE-2026-117571 WP Visitor Statistics (Real Time Traffic) < 8.8 - Unauthenticated Stored XSS via Tracker D
CVE-2026-114443 Security by CleanTalk < 2.191 - Unauthenticated Authentication Bypass via Authenticator Ap
CVE-2026-114444 Security by CleanTalk < 2.191 - Admin+ Sensitive Data Disclosure via FSWatcher File Viewer
CVE-2026-114422 Enable Media Replace 4.1.4 - 4.2.2 - Unauthenticated PHP Object Injection via Metadata Rep
CVE-2026-115277 WP User Frontend < 4.3.14 - Reflected XSS via 'field_attr' Parameter

IV. Related Vulnerabilities

Same vendor: Unknown