CVE-2026-33638
Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint
CVSS Score
5.3
EPSS Score
0.1%
EPSS Percentile
19th
Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, `GET /api/allusers` is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.
| CWE | CWE-862 |
| Vendor | lin-snow |
| Product | ech0 |
| Published | Mar 26, 2026 |
| Last Updated | Mar 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
lin-snow / Ech0
< 4.2.0