CVE-2025-3774: Wise Chat <= 3.3.4 - Unauthenticated Stored Cross-Site Scripting via X-Forwarded-For Header

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-17 · updated 2026-06-17
Weakness: CWE-79

Description

The Wise Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the X-Forwarded-For header in all versions up to, and including, 3.3.4 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

marcinlawrowski Wise Chat: through 3.3.4

References

https://plugins.trac.wordpress.org/browser/wise-chat/tags/3.3.3/src/admin/WiseChatKicksTab.php#L11
https://www.wordfence.com/threat-intel/vulnerabilities/id/34fd5045-cd38-4eab-9e97-98f1e3d7423a?source=cve

Get alerted when CVE-2025-3774 or the next vulnerability affects your stack