CVE-2025-63589 — HIGH (7.1)

Vulnerability 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.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Cmsimple-Xh	Cmsimple Xh	1.8.0

Related Weaknesses (CWE)

CWE-79

References

https://github.com/cmsimple-xh/cmsimple-xh/blob/master/index.phpProduct
https://github.com/cybercrewinc/CVE-2025-63589ExploitThird Party Advisory
https://github.com/cybercrewinc/CVE-2025-63589ExploitThird Party Advisory

FAQ

What is CVE-2025-63589?

CVE-2025-63589 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...

How severe is CVE-2025-63589?

CVE-2025-63589 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-63589?

Check the references section above for vendor advisories and patch information. Affected products include: Cmsimple-Xh Cmsimple Xh.