Security Alert: Checkmk NagVis XSS Vulnerability Exposed!
Checkmk NagVis users, watch out! A reflected cross-site scripting vulnerability lurks in version 2.3.0p2. Clicking a malicious link could unleash rogue JavaScript on your browser, causing chaos. Update to stay safe and avoid becoming an accidental script-kiddie accomplice!
Hot Take:
Checkmk’s NagVis component is doing its best impression of a magician—disappearing your security with a wave of a POST request. It turns out the only thing more vulnerable than my New Year’s resolutions is this piece of software. Move over, David Copperfield, there’s a new act in town, and it’s called ‘Reflected Cross-Site Scripting’!
Key Points:
- Checkmk’s NagVis component is vulnerable to reflected cross-site scripting (XSS).
- Malicious JavaScript can be executed through a specially crafted POST request.
- Authenticated and unauthenticated users are both at risk.
- Vulnerability has been patched in NagVis 1.9.42 and Checkmk 2.3.0p10.
- Discovered by KoreLogic, with public disclosure in February 2025.
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