Stored Cross-Site Scripting in Simple Ajax Chat Plugin for WordPress
CVE-2026-2987

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Simple Ajax Chat – Add A Fast, Secure Chat Box
Vendor
CVE Published:
12 March 2026

What is CVE-2026-2987?

The Simple Ajax Chat plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability due to inadequate input sanitization and output escaping, specifically through the 'c' parameter in versions up to and including 20260217. This flaw allows unauthenticated attackers to inject arbitrary web scripts into pages, which can execute whenever users access these compromised pages, thus posing a significant risk to site integrity and user safety.

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Deploy the Patch

Affected Version(s)

Simple Ajax Chat – Add a Fast, Secure Chat Box * <= 20260217

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3472258/simp...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kazuma Matsumoto
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