Vulnerability · Published Mar 18, 2026 · Assigned by GitHub_M

CVE-2026-32638StudioCMS REST getUsers Exposes Owner Account Records to Admin Tokens

Low 2.7

In plain English

A low-severity authorization bypass via user-controlled key in studiocms from withstudiocms. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)2.7Low

Exploit odds (30 days)0.4%top 65.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	studiocms	0.4.4	GHSA-xvf4-ch4q-2m24

Affected products (as reported)

Vendor	Product	Versions
withstudiocms	studiocms	< 0.4.4

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/withstudiocms/studiocms/security/advisories/GHSA-xvf4-ch4q-2m24 x_refsource_CONFIRM
https://github.com/withstudiocms/studiocms/commit/aebe8bcb3618bb07c6753e3f5c982c1fe6adea64 x_refsource_MISC
https://github.com/withstudiocms/studiocms/releases/tag/studiocms@0.4.4 x_refsource_MISC