Blue OceanApplication · Jenkins
CVE-2020-2254
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 · uneditedJenkins Blue Ocean Plugin 1.23.2 and earlier provides an undocumented feature flag that, when enabled, allows an attacker with Job/Configure or Job/Create permission to read arbitrary files on the Jenkins controller file system.
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 Blue Ocean Plugin versions 1.23.2 and earlier contains an undocumented feature flag that, when enabled, allows authenticated attackers with Job/Configure or Job/Create permissions to read arbitrary files on the Jenkins controller file system, potentially exposing sensitive configuration files, credentials, or secrets.
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
Blue OceanApplication
<= 1.23.2CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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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Check installed Blue Ocean plugin versionNavigate to Manage Jenkins > Manage Plugins > Installed tab and locate the Blue Ocean plugin, or query the Jenkins REST API endpoint /pluginManager/plugin/blueocean-plugin/api/json to retrieve the installed versionAffected if Blue Ocean plugin version is 1.23.2 or earlier
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Locate undocumented feature flag configurationSearch Jenkins configuration files in $JENKINS_HOME/ and the Blue Ocean plugin directory for any feature flag settings related to file reading or file access functionalityAffected if A feature flag controlling file read access is present and enabled in the configuration
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Identify users with Job/Configure or Job/Create permissionsNavigate to Manage Jenkins > Manage and Assign Roles, or use the REST API at /role/strategy/getAllRoles to enumerate which users or groups hold Job/Configure or Job/Create permissionsAffected if Any user with permissions beyond trusted administrators holds Job/Configure or Job/Create access
Your environment is affected if Blue Ocean plugin version 1.23.2 or earlier is installed AND the undocumented feature flag is enabled AND untrusted users have Job/Configure or Job/Create permissions.
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 Blue Ocean Plugin to a version newer than 1.23.2, or audit and disable the undocumented feature flag if present in current configuration. Restrict Job/Configure and Job/Create permissions to trusted users only until patched.
Fix this in Blue Ocean
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-2254 — 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-2020-2254 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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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