CVE-2026-33638
MEDIUMEch0 authenticated user-list exposed data via public `/api/allusers` endpoint
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj
X_Refsource_Misc x_refsource_misc
https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681
X_Refsource_Misc x_refsource_misc
https://github.com/lin-snow/Ech0/releases/tag/v4.2.0
Scores
CVSS v3
5.3
EPSS
0.0048
EPSS Percentile
37.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-862
Status
published
Products (3)
ech0/ech0
< 4.2.0
lin-snow/ech0
0 - 1.4.8-0.20260322121226-acbf1fd71011Go
lin-snow/Ech0
< 4.2.0
Published
Mar 26, 2026
Tracked Since
Mar 27, 2026