CVE-2021-21245

Name: CVE-2021-21245
Creator: NVD / NIST
Published: 2021-01-15T21:15:13.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-21245 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, AttachmentUploadServlet also saves user controlled data (`request.getInputStream()`) to a user specified location (`request.getHeader("File-Name")`). EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, AttachmentUploadServlet also saves user controlled data (`request.getInputStream()`) to a user specified location (`request.getHeader("File-Name")`). This issue may lead to arbitrary file upload which can be used to upload a WebShell to OneDev server. This issue is addressed in 4.0.3 by only allowing uploaded file to be in attachments folder. The webshell issue is not possible as OneDev never executes files in attachments folder.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Onedev Project	Onedev	< 4.0.3

References

https://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacbPatch, Third Party Advisory
https://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9Third Party Advisory
https://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacbPatch, Third Party Advisory
https://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9Third Party Advisory

Timeline

Published: Jan 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21245?

How severe is CVE-2021-21245?

CVE-2021-21245 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21245?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21245?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST