CVE-2020-25209
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 · uneditedIn JetBrains YouTrack before 2020.3.6638, improper access control for some subresources leads to information disclosure via the REST API.
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 confidenceJetBrains YouTrack before version 2020.3.6638 contains an improper access control vulnerability in its REST API that allows unauthorized users to access certain subresources, resulting in information disclosure.
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< 2020.3.6638CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/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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Determine installed YouTrack versionAccess the YouTrack administration interface or check the version through the product itself. Typically found in Help > About or the administrative dashboard.Affected if The installed version is lower than 2020.3.6638 (e.g., 2020.3.x versions before 6638, or any version in the 2020.2.x, 2020.1.x, or earlier branches).
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Verify REST API is enabled and accessibleConfirm that the YouTrack REST API endpoints are reachable. The API is typically accessible at /api/* paths under the YouTrack base URL.Affected if The REST API endpoints are publicly or unrestrictedly accessible without proper authentication controls.
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Check external access configurationReview network exposure settings to determine if the YouTrack server is accessible from untrusted networks or the public internet.Affected if YouTrack is exposed to the internet or untrusted internal networks without proper network-level access restrictions.
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Review user authentication settingsExamine the authentication configuration in YouTrack administration to verify which authentication methods are enforced for API access.Affected if Anonymous or unauthenticated access is permitted to REST API subresources, or authentication is not properly enforced on API endpoints.
The environment is affected if the installed YouTrack version is earlier than 2020.3.6638 and the REST API is accessible without proper authorization controls.
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 data2020.3.6638
Upgrade YouTrack to version 2020.3.6638 or later to remediate this access control vulnerability.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25209 — 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-2020-25209 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