Cross-Site Scripting in Simple Ajax Chat Plugin by WordPress
CVE-2026-81807

8.8HIGH

Key Information:

Vendor

WordPress
Status
Simple Ajax Chat
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-81807?

The Simple Ajax Chat plugin for WordPress, prior to version 20260827, is susceptible to a cross-site scripting vulnerability. This issue arises because the plugin fails to properly escape chat message content before it is displayed. As a result, an unauthenticated user can inject arbitrary HTML and execute scripts within the browsers of users who view the chat, including administrators. This can lead to various security risks, including data theft and session hijacking.

Affected Version(s)

Simple Ajax Chat 0 < 20260827

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-81807 - Proof of Concept

References

https://wpscan.com/vulnerability/7aceefd5-aa09-4828-b375-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erwan LR (WPScan)
WPScan
.