What is CVE-2021-21244?

CVE-2021-21244 is a critical-severity vulnerability in Onedev Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 10.0/10. Published 2021-01-15.

How severe is CVE-2021-21244?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in Onedev Project

CVE-2021-21244

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, There is a vulnerability that enabled pre-auth server side template injection via Bean validation message tampering. Full details in the reference GHSA. This issue was fixed in 4.0.3 by disabling validation interpolation completely.

Published 2021-01-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.015 (74.1th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000

Affected products

Onedev Project
Theonedev Onedev — versions < 4.0.3

Weakness classification (CWE)

References

github.com/theonedev/onedev/security/advisories/GHSA-vm26-xg39-cfj4 (Third Party Advisory)
github.com/theonedev/onedev/commit/4f5dc6fb9e50f2c41c4929b0d8c5824b2cca3d65 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21244?: CVE-2021-21244 is a critical-severity vulnerability in Onedev Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 10.0/10. Published 2021-01-15.
How severe is CVE-2021-21244?: Critical severity. CVSS v3 base score is 10.0 out of 10.