CVE-2026-33677CWE-200

Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API

Medium · published March 24, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
35.6
In the wild
Unconfirmed
What it is

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. Version 2.2.1 patches the issue.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00423 · 35.6th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-03-24T15:36Z
EPSS history
Timeline
  • 24 MAR 15:36Z
    Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API
    cvelistv5