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CVE-2026-81807— Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification

Quick assessment

Affected
Unknown Simple Ajax Chat
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.

Simple Ajax Chat WordPress 插件在版本 20260827 之前未对聊天消息内容进行转义（escape），导致未认证用户可以向页面中注入任意 HTML 属性，从而在查看该聊天页面的任何用户（包括管理员）的浏览器中执行脚本。

AI Predicted 6.6 Difficulty: Moderate
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I. Basic Information for CVE-2026-81807

Vulnerability Information
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Vulnerability Title
Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification
Source: CVE Program / CVE List V5
Vulnerability Description
The Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, 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 Simple Ajax Chat 0 ~ 20260827 -

II. Public POCs for CVE-2026-81807

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III. Intelligence Information for CVE-2026-81807

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Security Blog Posts for CVE-2026-81807 (1)

Same Patch Batch · Unknown · 2026-09-02 · 41 CVEs total

CVE-2026-19453 JetBackup 3.1.7.9 - 3.1.23.3 - Subscriber+ Privilege Escalation via Restore Admin User Sel
CVE-2026-77783 Rank Math SEO < 1.0.277 - Unauthenticated Non-Public Post Schema and Content Disclosure
CVE-2026-77785 Rank Math SEO < 1.0.277 - Author+ Non-Public Post Content Disclosure via Abilities API
CVE-2026-77764 GamiPress < 7.9.9.6 - Subscriber+ Arbitrary User Points and Achievement Award via Watch-Vi
CVE-2026-77782 Rank Math SEO < 1.0.277.1 - Unauthenticated Password-Protected Post Content Disclosure via
CVE-2026-74927 MultiVendorX 5.0.13 - 5.0.14 - Unauthenticated Vendor PII and Payout Data Disclosure via s
CVE-2026-19116 WP User Frontend < 4.3.11 - Subscriber+ PHP Object Injection via Frontend Post Edit Form
CVE-2026-19251 Ultimate Member < 2.13.0 - Unauthenticated Unapproved Comment Disclosure via Profile Activ
CVE-2026-19704 Comments – wpDiscuz < 7.6.66 - Unauthenticated Comment Disclosure via SQLi
CVE-2026-19719 Social Media Share Buttons & Social Sharing Icons < 3.0.1 - Contributor+ Stored XSS via Po
CVE-2026-77784 Rank Math SEO < 1.0.277 - Author+ Robots and Pillar Content Meta Update on Non-Owned Objec
CVE-2026-19723 Social Media Share Buttons & Social Sharing Icons < 3.0.1 - Reflected XSS via Pin It Share
CVE-2026-15232 Appointment Booking Lite < 2.4.8 - Unauthenticated Arbitrary Reservation Deletion
CVE-2026-16966 Solace Extra < 1.7.0 - Unauthenticated Draft/Private Site Builder Content Disclosure via g
CVE-2026-16983 Gutentor < 4.0.6 - Subscriber+ Password Protected Post Password Disclosure via REST API
CVE-2026-14215 Amelia < 2.4.9 - Unauthenticated Post-Booking Action Trigger
CVE-2026-12526 Advanced Custom Fields: Extended < 0.9.2.7 - Unauthenticated Administrator Account Takeove
CVE-2026-12865 Photo Gallery by 10Web < 1.8.44 - Reflected XSS via title and paged Parameters
CVE-2025-15663 BEAF < 4.7.19 - Author+ Stored XSS via After Label
CVE-2025-15664 BEAF < 4.7.19 - Author+ Stored XSS via Before Label

Showing top 20 of 41 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Simple Ajax Chat
Same vendor: Unknown

V. Comments for CVE-2026-81807

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