CVE-2026-35600

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 51/100
Published: 2026-04-10 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: Required
S: Changed
C: Low
I: Low
A: None

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows <a> and <img> tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
vikunja vikunja < 2.3.0

Bug Bounty Relevance

51 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

5.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.19%
Raw Score 0.001950
Percentile 9.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00195
2026-10-28
0.00195

Intelligence Sources

nvd ref →