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

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-33638
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-26 21:17:07 UTC
Updated2026-03-31 21:09:16 UTC
DescriptionEch0 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.000740000 probability, percentile 0.224470000 (date 2026-04-05)

Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ech0 Ech0 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Lin-snow Ech0 affected < 4.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj [email protected] github.com Vendor Advisory
github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681 [email protected] github.com Patch
github.com/lin-snow/Ech0/releases/tag/v4.2.0 [email protected] github.com Product, Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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