Auth bypass in Ulicms
CVE-2023-53923
UliCMS 2023.1 contains a privilege escalation vulnerability that allows unauthenticated attackers to create administrative accounts through the UserController endpoint. Attackers can send a crafted POST request to /dist/admin/index.php with specific parameters to generate a new admin user with full system access.
Vulnerability class: Broken Access Control
EPSS: 0.005 (39.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Ulicms — versions 2023.1
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, exploit)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53923?
- CVE-2023-53923 is a critical-severity vulnerability in Ulicms, classified under Missing Authorization. CVSS score: 9.8/10. Published 2025-12-17.
- How severe is CVE-2023-53923?
- Critical severity. CVSS v3 base score is 9.8 out of 10.