CVE-2024-56356
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 TeamCity before 2024.12 insecure XMLParser configuration could lead to potential XXE attack
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 confidenceTeamCity before version 2024.12 contains an insecure XMLParser configuration that enables XML External Entity (XXE) attacks. The XML parser is not properly configured to disable external entity processing, allowing attackers to inject malicious XML that can access internal files or perform server-side request forgery.
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< 2024.12CVSS 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
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/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 installed TeamCity versionAccess the TeamCity administration interface and navigate to 'About' page, or check the buildServer.properties file in the TeamCity data directory for the version numberAffected if The version displayed is less than 2024.12 (for example, 2024.11, 2024.10, older versions)
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Verify TeamCity server is operationalConfirm the TeamCity web interface is accessible and the server is runningAffected if TeamCity is running and the version cannot be determined or is confirmed as pre-2024.12
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Check XML processing usageReview TeamCity logs or configurations for XML import/export operations, build configurations using XML, or API calls that process XML contentAffected if TeamCity processes XML input from external or untrusted sources (this increases exposure to the XXE vulnerability)
You are affected if your installed TeamCity version is any release before 2024.12, regardless of whether XML processing features are actively used, as the insecure parser configuration exists in the base installation.
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.
dbcve · scoped2024.12
Upgrade JetBrains TeamCity to version 2024.12 or later. If immediate upgrade is not possible, review and harden XML parser configuration to disable external entity and DTD processing.
TeamCity 2024.12
- Back up your TeamCity data directory and database before upgrading
- Download TeamCity 2024.12 from the official JetBrains website (www.jetbrains.com/teamcity/download)
- Stop the TeamCity server
- Run the TeamCity installer or extract the new version to replace the existing installation
- Start the TeamCity server and verify all services are running
- Verify the XMLParser configuration has been updated by checking that the vulnerability is resolved
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-56356 — 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-2024-56356 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
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