What’s Vulnerable › Vulnerabilities

CVE-2026-2987: Simple Ajax Chat <= 20260217 - Unauthenticated Stored Cross-Site Scripting via 'c'

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-12 · updated 2026-06-17
• Weakness: CWE-79

Description

The Simple Ajax Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'c' parameter in versions up to, and including, 20260217 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.

Affected products

• specialk Simple Ajax Chat – Add a Fast, Secure Chat Box: through 20260217

References

• https://plugins.trac.wordpress.org/changeset/3472258/simple-ajax-chat
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3c07dec6-ddb7-45df-8bdf-57f562102c4b?source=cve

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