CVE-2021-43183
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 Hub before 2021.1.13690, the authentication throttling mechanism could be bypassed.
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 Hub versions prior to 2021.1.13690, an authentication throttling bypass vulnerability existed that could allow attackers to circumvent rate limiting protections. This could enable brute-force attacks against user credentials without triggering account lockouts or throttling mechanisms.
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< 2021.1.13690CVSS 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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Locate JetBrains Hub installationCheck common installation directories such as /opt/hub, /usr/local/hub, or the installation path specified during setup. On Windows, check Program Files\JetBrains\Hub. Look for the hub.jar or hub startup scripts.Affected if JetBrains Hub is found on the system
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Determine installed Hub versionRun the command 'java -jar hub.jar --version' from the installation directory, or check the version displayed in the Hub admin console under 'About' or 'System Information'. The version is typically displayed as a build number.Affected if The version number is below 2021.1.13690
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Verify authentication module is activeAccess the Hub login page at your Hub URL (typically port 8080 or 8443). Confirm the login form is accessible and authentication is enabled. Check Hub configuration files (hub-config.properties) for authentication-related settings.Affected if The login interface is accessible and authentication is enabled
If JetBrains Hub is installed with a version lower than 2021.1.13690 and has its authentication interface exposed, the environment is vulnerable to this throttling 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.
dbcve · scoped2021.1.13690
Upgrade JetBrains Hub to version 2021.1.13690 or later to remediate this vulnerability. If immediate patching is not possible, implement additional authentication controls such as IP-based rate limiting at the network perimeter.
2021.1.13690 or later
- Upgrade JetBrains Hub to version 2021.1.13690 or later
- After upgrade, verify that authentication throttling is properly enforced by attempting multiple failed login attempts
- Confirm the throttling mechanism now correctly blocks or delays repeated authentication attempts
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-43183 — 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-2021-43183 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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