CVE-2020-27219
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 all version of Eclipse Hawkbit prior to 0.3.0M7, the HTTP 404 (Not Found) JSON response body returned by the REST API may contain unsafe characters within the path attribute. Sending a POST request to a non existing resource will return the full path from the given URL unescaped to the client.
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 confidenceIn Eclipse Hawkbit versions prior to 0.3.0M7, the REST API's 404 error handler returns the requested path unescaped in the JSON response body. When a POST request targets a non-existent resource, the full URL path is reflected back to the client without sanitization, potentially exposing system path information or enabling further injection attacks.
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<= 0.2.5= 0.3.0CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 Eclipse Hawkbit versionLocate the Hawkbit installation and check the version file or startup logs. Common locations include the war file name, manifest, or the management UI footer.Affected if Version is 0.2.5 or earlier, or exactly 0.3.0
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Verify the API is exposedConfirm that the Hawkbit REST API is accessible on the network. Check if the API endpoint (typically /rest/v1/) responds to requests.Affected if API endpoints are reachable from the network being assessed
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Test 404 response handlingSend a POST request to a non-existent API endpoint (e.g., POST /rest/v1/nonexistentpath) and capture the JSON response body.Affected if The returned JSON response contains the requested path reflected back without proper HTML/entity encoding (e.g., shows < or > characters unescaped, or the raw path that could enable XSS)
If the installed version is 0.2.5 or earlier, or exactly 0.3.0, and the 404 response reflects the requested path unescaped in the JSON body, the environment is affected by this CVE.
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 Eclipse Hawkbit to version 0.3.0M7 or later, which properly escapes the path attribute in 404 responses. As a temporary mitigation, avoid exposing the API to untrusted networks until the patch is applied.
- Consultation2.0 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-2020-27219 — 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-2020-27219 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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