Active DirectoryApplication · Jenkins
CVE-2020-2299
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 Active Directory Plugin 2.19 and earlier allows attackers to log in as any user if a magic constant is used as the password.
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 confidenceThe Jenkins Active Directory Plugin versions 2.19 and earlier contains a hardcoded 'magic constant' password that, when used, allows an attacker to authenticate as any user in the Active Directory domain. This represents a complete authentication bypass vulnerability due to the presence of this static credential.
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
Active DirectoryApplication
<= 2.19CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 the Jenkins Active Directory plugin versionIn Jenkins, go to Manage Jenkins > Manage Plugins > Installed tab and locate the Active Directory plugin, or inspect the version file in $JENKINS_HOME/plugins/active-directory/Affected if The installed version is 2.19 or earlier
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Verify if hardcoded credentials are configured in the AD pluginNavigate to Manage Jenkins > Configure Global Security > Active Directory domain configuration and inspect whether a password is hardcoded in the domain settingsAffected if A static password is configured in the Active Directory plugin settings
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Review authentication logs for anomalous successful loginsExamine Jenkins logs and Windows Security Event Logs for successful authentications using unusual passwords or attempts to authenticate as arbitrary AD users without proper credential validationAffected if Logs show successful authentications that do not correspond to valid AD credentials or exhibit patterns consistent with the magic constant bypass
If the Active Directory plugin version is 2.19 or earlier and a hardcoded password exists in the AD configuration, the environment is vulnerable to authentication bypass.
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 the Jenkins Active Directory Plugin to version 2.20 or later. Additionally, review authentication logs for any unauthorized access using the magic constant and rotate all AD credentials as a precaution.
Fix this in Active Directory
Scoped from the published advisory
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-2299 — 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-2020-2299 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
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