Is CVE-2021-21246 actively exploited?

No active exploitation of CVE-2021-21246 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21246 be exploited remotely?

Yes. CVE-2021-21246 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-21246?

CVE-2021-21246 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-21246

HIGH

CVE-2021-21246

CWE-862Published: January 15, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, the REST UserResource endpoint performs a security check to make sure that only administrators can list user details. However for the `/users/{id}` endpoint there are no security checks enforced so it is possible to retrieve arbitrary user details including their Access Tokens! These access tokens can be used to access the API or clone code in the build spec via the HTTP(S) protocol. It has permissions to all projects accessible by the user account. This issue may lead to `Sensitive data leak` and leak the Access Token which can be used to impersonate the administrator or any other users. This issue was addressed in 4.0.3 by removing user info from restful api.

NVD Source

Technical Analysis

CVE-2021-21246 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.