CVE-2024-38857
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper neutralization of input in Checkmk before versions 2.3.0p8, 2.2.0p28, 2.1.0p45, and 2.0.0 (EOL) allows attackers to craft malicious links that can facilitate phishing attacks.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a Cross-Site Scripting (XSS) vulnerability in Checkmk where improper neutralization of input allows attackers to craft malicious links. Attackers can inject malicious scripts through crafted URLs that, when clicked by users, can execute in the context of the victim's session, enabling phishing attacks and potential session hijacking.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2.0.0= 2.1.0= 2.2.0= 2.3.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Checkmk versionRun the command 'cmk --version' or check the Checkmk web interface footer for the version numberAffected if The version is 2.0.0 or lower, 2.1.0, 2.2.0, or 2.3.0 (not patched to 2.3.0p8, 2.2.0p28, 2.1.0p45, or later)
The environment is affected if the installed Checkmk version matches any of the unpatched versions listed in the affected products range and the web interface is accessible to potential attackers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade Checkmk to version 2.3.0p8, 2.2.0p28, 2.1.0p45, or later. Until patched, implement URL filtering and warn users not to click untrusted links.
2.3.0p8 (or later), 2.2.0p28 (or later), or 2.1.0p45 (or later) depending on your major version branch
- Identify your current Checkmk version using the Checkmk web interface or `cmk --version` command
- If running 2.3.0.x, upgrade to version 2.3.0p8 or later
- If running 2.2.0.x, upgrade to version 2.2.0p28 or later
- If running 2.1.0.x, upgrade to version 2.1.0p45 or later
- If running 2.0.0 or earlier, note that 2.0.0 is End-of-Life; upgrade to a supported version (2.1.0p45+, 2.2.0p28+, or 2.3.0p8+)
- Download the appropriate patch from checkmk.com and follow standard Checkmk upgrade procedures
- After upgrade, verify the XSS fix by testing that malicious link payloads are no longer executed
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-38857 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-38857 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data