Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `picture` claim URL. An attacker who controls their OIDC profile picture URL can force the Vikunja server to make HTTP GET requests to arbitrary internal or cloud metadata endpoints.
This bypasses the SSRF protections that are correctly applied to the webhook system. Version 2.2.1 patches the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a55039…
security-advisories@github.com
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63
security-advisories@github.com
https://vikunja.io/changelog/vikunja-v2.2.2-was-released
security-advisories@github.com