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

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-33679
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-24 16:16:35 UTC
Updated2026-03-30 13:56:01 UTC
DescriptionVikunja 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

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

EPSS: 0.000400000 probability, percentile 0.120170000 (date 2026-04-01)

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.4HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Vikunja Vikunja All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go-vikunja Vikunja affected < 2.2.1 Not specified

References

ReferenceSourceLinkTags
github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63 [email protected] github.com Exploit, Vendor Advisory
vikunja.io/changelog/vikunja-v2.2.2-was-released [email protected] vikunja.io Release Notes
github.com/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a550393... [email protected] github.com Patch
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