CVE-2021-21243
CriticalIn OneDev before version 4.0.3, a Kubernetes REST endpoint exposes two methods that deserialize untrusted data from the request body.
Published Jan 15, 2021 · Updated Oct 9, 2026 · Also known as GHSA-9mmq-fm8c-q4fv
Key Facts
Patch immediately- CVE-2021-21243 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Onedev (Onedev Project).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Onedev 4.0.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
54%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, a Kubernetes REST endpoint exposes two methods that deserialize untrusted data from the request body. These endpoints do not enforce any authentication or authorization checks. This issue may lead to pre-auth RCE. This issue was fixed in 4.0.3 by not using deserialization at KubernetesResource side.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OnedevOnedev Project | >= < 4.0.3 | 4.0.3 |
Patched Releases
Onedev
4.0.3
Timeline
Publicly disclosed
Jan 15, 2021
Last updated
Oct 9, 2026
Weakness Type
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-502 Deserialization of Untrusted Data
References
FAQ
Common Questions.
OneDev is an all-in-one devops platform.
Affected: Onedev (Onedev Project) versions >= < 4.0.3. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Onedev 4.0.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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