# CVE-2026-108812: SEMCMS improper authorization in user deletion

Source: https://junglewise.ai/threats/cve-2026-108812-a-security-vulnerability-has-been-detected-in-semcms-up-to-5-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108812 · Severity: medium · CVSS 6.5 · Published 2026-10-12

SEMCMS is a content management system that stores user accounts and administrative functions. A flaw in user management allows anyone, even unauthenticated users, to delete arbitrary user accounts by bypassing authorization checks. An attacker could delete all administrative and user accounts, causing loss of access and operational disruption.

Technologies: [SEMCMS](https://junglewise.ai/threats/technologies/semcms). Vendors: [SEMCMS](https://junglewise.ai/threats/vendors/semcms).

## Quick answers

**Is CVE-2026-108812 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108812 being exploited in the wild.

**How severe is CVE-2026-108812?** Medium severity, with a CVSS score of 6.5, published 12 October 2026.

**Which products and versions are affected?** SEMCMS up to 5.0.

**Is there a fix for CVE-2026-108812?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-108812 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-108812?** Check whether you run SEMCMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper authorization vulnerability exists in SEMCMS versions up to 5.0 in the user deletion endpoint (/admin/SEMCMS_User.php). The vulnerability allows unauthenticated requests to delete user accounts because the application fails to verify session cookies or authorization tokens before processing deletion requests. An attacker can craft HTTP requests to the user deletion endpoint without authentication to remove any user account.

## Affected products

- SEMCMS SEMCMS up to 5.0

## Timeline

- 2026-10-12: disclosed
- exploited: Exploit disclosed publicly on GitHub

## References

- [https://github.com/ants01/semcmsPHP-V5.0-There-is-an-unauthorized-deletion-of-arbitrary-users.](https://github.com/ants01/semcmsPHP-V5.0-There-is-an-unauthorized-deletion-of-arbitrary-users.)
- [https://vuldb.com/cve/CVE-2026-108812](https://vuldb.com/cve/CVE-2026-108812)

## Related threats

- [SEMCMS SQL injection in SEMCMS_Banner.php](https://junglewise.ai/threats/cve-2026-108814-a-flaw-has-been-found-in-semcms-up-to-5-0-this-impacts-an)
- [SEMCMS unauthenticated file upload in KindEditor interface](https://junglewise.ai/threats/cve-2026-96739-a-flaw-has-been-found-in-semcms-up-to-4-2-affected-by-this-issue)
- [SemCms CSRF in admin user management module](https://junglewise.ai/threats/cve-2026-39170-semcms-csrf-in-admin-user-management-module)
- [SEMCMS unauthenticated database export in SEMCMS_copy.php](https://junglewise.ai/threats/cve-2026-39169-semcms-unauthenticated-database-export-in-semcms-copy-php)
- [SemCms SQL injection in SEMCMS_Products.php](https://junglewise.ai/threats/cve-2025-51660-semcms-sql-injection-in-semcms-products-php)