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CVE-2026-33700

Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Project Link Share Deletion

Published: Mar 24, 2026Updated: Mar 30, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
4.9CVSSMEDIUM
EPSS Score
0.2%
Top 89.6%
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 `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-639

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

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-f95f-77jx-fcjc
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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