CVE-2026-32104 json
StudioCMS: IDOR in User Notification Preferences Allows Any Authenticated User to Modify Any User's Settings
published 7mo ago modified 4mo ago also GHSA-9v82-xrm4-mp52 , EUVD-2026-11373
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.3, the updateUserNotifications endpoint accepts a user ID from the request payload and uses it to update that user's notification preferences. It checks that the caller is logged in but never verifies that the caller owns the target account (id !== userData.user.id). Any authenticated visitor can modify notification preferences for any user, including disabling admin notifications to suppress detection of malicious activity. This vulnerability is fixed in 0.4.3.
Patch / fix
- npm studiocms 0.4.3
- studiocms studiocms 0.4.3
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/withstudiocms/studiocms/security/advisories/GHSA-9v82-xrm4-mp52 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | studiocms | <0.4.3 |
0.4.3 |
Affected products
- withstudiocms studiocms
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/withstudiocms/studiocms/security/advisories/GHSA-9v82-xrm4-mp52
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-32104
advisory
-
github.com
/withstudiocms/studiocms
package
Sources
- CVE List CVE-2026-32104
- GitHub Advisory GHSA-9v82-xrm4-mp52
- NVD CVE-2026-32104
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