JenkinsApplication
CVE-2018-1999047
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 · uneditedA improper authorization vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in UpdateCenter.java that allows attackers to cancel a Jenkins restart scheduled through the update center.
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 · high confidenceJenkins versions 2.137 and earlier, and 2.121.2 and earlier contain an improper authorization vulnerability in UpdateCenter.java that allows unauthorized attackers to cancel a Jenkins restart that was scheduled through the update center. This bypasses the intended authorization controls for restart operations.
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
JenkinsApplication
<= 2.121.2<= 2.137CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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.
-
Check installed Jenkins versionNavigate to the Jenkins dashboard and locate the version displayed in the footer, or go to Manage Jenkins > About Jenkins to see the exact version numberAffected if Version is 2.137 or earlier, or 2.121.2 or earlier (for LTS releases)
-
Verify if UpdateCenter restart was scheduledCheck the Update Center status at /updateCenter/ or look for pending restart notifications on the Jenkins dashboard indicating a scheduled restart following an updateAffected if A restart was scheduled through the Update Center (updates installed that require restart)
-
Confirm access to UpdateCenter APIAttempt to access the UpdateCenter REST API endpoint (for example, /updateCenter/api/json) or check if the update center is reachable without authenticationAffected if UpdateCenter API is accessible to users without proper admin authorization (this is where the bypass occurs)
You are affected if your Jenkins version is 2.137 or earlier (or 2.121.2 or earlier LTS) AND you have scheduled updates through the UpdateCenter that required a restart, and the restart cancellation action could be triggered by an unauthorized user.
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.
From vendor dataUpgrade Jenkins to version 2.138 or later (or 2.121.3 or later for the 2.x LTS line) to receive the patched code that properly enforces authorization checks before allowing restart cancellation.
Fix this in Jenkins
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,512.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-1999047 — 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-2018-1999047 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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