CVE-2025-63589

HIGH 1 PoC
MEDIUM Priority: 0.03 BB Relevance: 74/100
Published: 2025-11-06 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: Low
A: None

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
cmsimple-xh cmsimple_xh 1.8.0

Proof of Concept (1)

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ PoC available (1)

CVSS Score

7.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

EPSS — Exploitation Probability

0.36%
Raw Score 0.003550
Percentile 29.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00355
2026-11-12
0.00355
2026-11-10
0.00355
2026-11-09
0.00355
2026-11-08
0.00355
2026-11-07
0.00355
2026-11-06
0.00355
2026-11-05
0.00355

Intelligence Sources

nvd ref →