What is CVE-2021-21242?

CVE-2021-21242 is a critical-severity vulnerability in Theonedev Onedev, 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-2021-21242?

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

Is CVE-2021-21242 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Theonedev Onedev

CVE-2021-21242

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which can lead to pre-auth remote code execution. AttachmentUploadServlet deserializes untrusted data from the `Attachment-Support`…

EPSS: 0.404 (97.4th percentile) — read the EPSS interpretation.

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.

Affected products

Theonedev Onedev — versions < 4.0.3

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Public proof-of-concept exploits

References

github.com/theonedev/onedev/security/advisories/GHSA-5q3q-f373-2jv8 (x_refsource_CONFIRM)
github.com/theonedev/onedev/commit/f864053176c08f59ef2d97fea192ceca46a4d9be (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21242?: CVE-2021-21242 is a critical-severity vulnerability in Theonedev Onedev, 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-2021-21242?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2021-21242 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.