CVE-2021-21243

Pre-Auth Unsafe Deserialization on KubernetesResource

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.

Categories

10.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.51% Top 20%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: theonedev onedev
Published at:
Updated at:

References

Link Tags
https://github.com/theonedev/onedev/security/advisories/GHSA-9mmq-fm8c-q4fv third party advisory
https://github.com/theonedev/onedev/commit/9637fc8fa461c5777282a0021c3deb1e7a48f137 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-21243?
CVE-2021-21243 has been scored as a critical severity vulnerability.
How to fix CVE-2021-21243?
To fix CVE-2021-21243, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21243 being actively exploited in the wild?
It is possible that CVE-2021-21243 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21243?
CVE-2021-21243 affects theonedev onedev.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.