medium5.4
CVE-2026-8833
Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an a…
Impact
Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicious URLs such as javascript: URIs, resulting in cross-site scripting when another user interacts with the crafted link.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Checkmk | Checkmk | Versions 2.2.0, 2.3.0, 2.4.0, 2.5.0 |