CVE-2025-63589

HIGH

CMSimple_XH 1.8 - Reflected Cross-Site Scripting via URL Path Segments

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-63589. PoCs published by cybercrewinc.

AI-analyzed exploit summary This repository contains a proof-of-concept for CVE-2025-63589, a reflected XSS vulnerability in CMSimple_XH 1.8. The exploit demonstrates how unsanitized path segments in the `index.php` front-controller can be injected into HTML attributes, leading to arbitrary JavaScript execution.

Description

A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are not sanitized or encoded before being inserted into the generated HTML (navigation links, breadcrumbs, search form action, footer links). An attacker-controlled string placed in the URL path is reflected into multiple HTML elements, allowing execution of arbitrary JavaScript in victims' browsers visiting a crafted URL.

Exploits (1)

nomisec WORKING POC
by cybercrewinc · poc
https://github.com/cybercrewinc/CVE-2025-63589

This repository contains a proof-of-concept for CVE-2025-63589, a reflected XSS vulnerability in CMSimple_XH 1.8. The exploit demonstrates how unsanitized path segments in the `index.php` front-controller can be injected into HTML attributes, leading to arbitrary JavaScript execution.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: CMSimple_XH 1.8
No auth needed
Prerequisites: Access to a vulnerable CMSimple_XH instance
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 7.1
EPSS 0.0028
EPSS Percentile 19.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
cmsimple-xh/cmsimple_xh 1.8.0
Published Nov 06, 2025
Tracked Since Feb 18, 2026