CVE-2026-27616

HIGH EPSS 36.1%
Published Feb 25, 20264mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 3.1
High
Find Similar
Published Feb 25, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to upload SVG files as task attachments. SVG is an XML-based format that supports JavaScript execution through elements such as <script> tags or event handlers like onload. The application does not sanitize SVG content before storing it. When the uploaded SVG file is accessed via its direct URL, it is rendered inline in the browser under the application's origin. As a result, embedded JavaScript executes in the context of the authenticated user. Because the authentication token is stored in localStorage, it is accessible via JavaScript and can be retrieved by a malicious payload. Version 2.0.0 patches this issue.

CVSS Details

Base Score
7.3
Exploitability
2.1
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
36.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
vikunjavikunja* <2.0.0

References 3

  • github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-7jp5-298q-jg98
    Vendor Advisory
  • github.com https://github.com/user-attachments/files/25414870/Stored.XSS.Proof.of.concept.pdf
    ExploitThird Party Advisory
  • vikunja.io https://vikunja.io/changelog/vikunja-v2.0.0-was-released
    Release Notes

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.