CVE-2025-63588

High · 7.1

CVSS

7.1

EPSS

0.4%

Published

Nov 6, 2025

CISA due date

—

The record

An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attackers to inject and execute arbitrary JavaScript in a victim's browser via a crafted request (e.g., a maliciously crafted POST login). Successful exploitation may lead to theft of session cookies, credential disclosure, or other client-side impacts.

Affected packages

Ecosystem	Package	Introduced	Fixed