Improper access control in OneDev - CVE-2021-21245
Published: January 12, 2021 / Updated: May 5, 2026
Vulnerability identifier: #VU129795
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21245
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to upload arbitrary files.
The vulnerability exists due to improper access control in AttachmentUploadServlet when handling file upload requests. A remote attacker can send a crafted upload request with a user-controlled File-Name header to upload arbitrary files.
This file system operation occurs before authentication or authorization checks are enforced.
Affected software
OneDev
How to mitigate CVE-2021-21245
Install security update from vendor's website.
OneDev - update to 4.0.3