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CVE-2026-33679

Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections

Published: Mar 24, 2026Updated: Mar 30, 2026 Sources: CVE List NVDCWE-918
NVD MITRE
6.4CVSSMEDIUM
EPSS Score
0.3%
Top 75.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:LI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-918

Affected Products

vikunjago-vikunja
On-prem
Cloud & SaaS / saas-application
vikunjavikunja
On-prem
Enterprise Software / collaboration-groupware
go-vikunjaoss-projectCloud & SaaSaka vikunja
vikunjaoss-projectEnterprise Software

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63
github.com
https://github.com/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a550393af1cf
github.com
https://vikunja.io/changelog/vikunja-v2.2.2-was-released
vikunja.io

Timeline

Published
Mar 24, 2026
Last Updated
Mar 30, 2026

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