What’s Vulnerable › Vulnerabilities

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

• Severity: low (CVSS 2.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-18 · updated 2026-06-17
• Weakness: CWE-639

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 products

• withstudiocms studiocms: before 0.4.4 — fixed in 0.4.4

How to fix

Upgrade to a fixed version: withstudiocms studiocms 0.4.4. Check the vendor advisory for mitigations.

References

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

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