Arbitrary file upload in Ulicms
CVE-2023-53924
UliCMS 2023.1-sniffing-vicuna contains a remote code execution vulnerability that allows authenticated attackers to upload PHP files with .phar extension during profile avatar upload. Attackers can trigger code execution by visiting the uploaded file's location, enabling system command execution through maliciously crafted avatar uploads.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
- Ulicms — versions 2023.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51434 (Exploit, exploit)
- web.archive.org/web/20230314183734/https://en.ulicms.de/ (Product, product)
- www.vulncheck.com/advisories/ulicms-sniffing-vicuna-remote-code-execution-via-a… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53924?
- CVE-2023-53924 is a high-severity vulnerability in Ulicms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-12-17.
- How severe is CVE-2023-53924?
- High severity. CVSS v3 base score is 8.8 out of 10.