CVE-2025-63589 Cross-site scripting in n/a
Reflected XSS in CMSimple_XH allows attackers to execute arbitrary JavaScript in victims' browsers via crafted URLs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-63589?
CVE-2025-63589 is a high-severity cross-site scripting vulnerability in n/a, published on 6 Nov 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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: CWE-79
Which versions are affected by CVE-2025-63589?
It affects 1 product.
Products include Cmsimple-Xh Cmsimple Xh.
How do I fix CVE-2025-63589?
No fix has been published for CVE-2025-63589 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-63589 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63589 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vjvr-7hrq-r8p6.