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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.

PUBLISHED Reserved 2026-02-22 | Published 2026-03-12 | Updated 2026-03-12 | Assigner Wordfence




MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2026-02-25:Vendor Notified
2026-03-12:Disclosed

Credits

Kazuma Matsumoto finder

References

www.wordfence.com/...-ddb7-45df-8bdf-57f562102c4b?source=cve

plugins.trac.wordpress.org/...geset/3472258/simple-ajax-chat

cve.org (CVE-2026-2987)

nvd.nist.gov (CVE-2026-2987)

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