Privilege Escalation in UliCMS by UliCMS GmbH
CVE-2023-53923

9.3CRITICAL

Key Information:

Vendor

Ulicms

Status
Ulicms
Vendor
CVE Published:
17 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-53923?

UliCMS version 2023.1 contains a security flaw that enables unauthenticated users to exploit the UserController endpoint. By crafting a specific POST request to /dist/admin/index.php, attackers can create new administrative accounts without proper authorization, granting them full access to the system. This vulnerability poses a serious threat to the integrity and security of installations running this software, allowing malicious actors to manipulate or compromise administrative functions.

Affected Version(s)

Ulicms 2023.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-53923 - Proof of Concept

References

https://www.exploit-db.com/exploits/51433
exploit
https://web.archive.org/web/20230314183734/https://en.uli...
product
https://www.vulncheck.com/advisories/ulicms-privilege-esc...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mirabbas Ağalarov
JSON
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CVE-2023-53923 : Privilege Escalation in UliCMS by UliCMS GmbH