Auth bypass in Studiocms
CVE-2026-32638
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.4, the REST API `getUsers` endpoint in StudioCMS uses the attacker-controlled `rank` query parameter to decide whether owner accounts should be filtered from the result set. As a result, an admin token can request `rank=owner` and receive owner account records, including IDs, usernames, display names, and email addresses, even though the adjacent `getUser` endpoint correctly blocks admins from viewing owner users. This is an authorization inconsistency inside the same user-management surface. Version 0.4.4 fixes the issue.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.004 (30.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Studiocms
- Withstudiocms Studiocms — versions < 0.4.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-32638?
- CVE-2026-32638 is a low-severity vulnerability in Studiocms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 2.7/10. Published 2026-03-18.
- How severe is CVE-2026-32638?
- Low severity. CVSS v3 base score is 2.7 out of 10.