CVE-2026-33638 Details
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.
A vulnerability in Ech0, an open-source publishing platform, allows for remote, unauthenticated user enumeration and exposure of user profile metadata. This issue is present in versions prior to 4.2.0, where the 'GET /api/allusers' endpoint is publicly accessible without authentication. The vulnerability arises from an access control bypass, enabling unauthorized access to user data. The flaw can be exploited by calling the public user-list endpoint, which responds with a list of user profiles, including sensitive information such as usernames and email addresses.
Users can upgrade to Ech0 version 4.2.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 27, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ech0 ech0 | < 4.2.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 31, 2026 | Initial Analysis | [email protected] |
| Mar 26, 2026 | New CVE Received | [email protected] |