CVE-2026-33638

Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint

State: Published
Severity: 5.3 Medium
Published: Mar 26, 2026
Updated: Mar 27, 2026
Reserved: Mar 23, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
Ech0lin-snow	< 4.2.0Affected

References

https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj
https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681
https://github.com/lin-snow/Ech0/releases/tag/v4.2.0

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