CVE-2020-15818
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 2020.2.8527, the subtasks workflow could disclose issue existence.
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 confidenceIn JetBrains YouTrack before version 2020.2.8527, the subtasks workflow feature contained an information disclosure vulnerability that could reveal the existence of issues to users who should not have access to them. This is an authorization bypass allowing unauthorized issue visibility through the subtasks workflow.
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< 2020.2.8527CVSS 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
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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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Identify YouTrack versionLog into YouTrack as an administrator and navigate to Administration > System > Overview, or append /about to the YouTrack URL to view the version informationAffected if The displayed version is earlier than 2020.2.8527
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Verify subtasks workflow is in useNavigate to Administration > Projects > [Select Project] > Workflows and look for any workflow that manages or references subtasks, or check if any project uses the built-in subtasks feature under Project Settings > SubtasksAffected if A subtasks workflow is active in any project
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Review subtask visibility permissionsUnder Administration > Groups and Administration > Roles, examine which groups or roles have permission to view issues in projects that contain subtasks. Check if any group with limited project access could potentially see subtask issue links that reveal hidden parent issuesAffected if Users or groups with restricted project access exist and could potentially observe subtask links to issues they should not access
You are affected if your YouTrack version is earlier than 2020.2.8527 and you use the subtasks workflow feature, as unauthorized users may be able to infer the existence of hidden issues through subtask visibility.
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 data2020.2.8527
Upgrade YouTrack to version 2020.2.8527 or later. Review user permissions and group memberships related to subtask visibility as a precautionary measure.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 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 $3,648.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-15818 — 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-2020-15818 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