CVE-2023-53923 — UliCMS 2023

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 a

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Ulicms	Ulicms	2023.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-12-17T22:44:54.318Z
• Last modified: 2026-03-05T12:02:59.441Z

09References

• www.exploit-db.com — https://www.exploit-db.com/exploits/51433
• web.archive.org — https://web.archive.org/web/20230314183734/https://en.ulicms.de/
• www.vulncheck.com — https://www.vulncheck.com/advisories/ulicms-privilege-escalation-via-unauthentic…