Arbitrary file upload in Impresscms
CVE-2022-50912
ImpressCMS 1.4.4 contains a file upload vulnerability with weak extension sanitization that allows attackers to upload potentially malicious files. Attackers can bypass file upload restrictions by using alternative file extensions .php2.php6.php7.phps.pht to execute arbitrary PHP code on the server.
Vulnerability class: Unrestricted File Upload
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.011 (65.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.001
Affected products
- Impresscms — versions 1.4.4
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50890 (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.impresscms.org/ (Product, product)
- github.com/ImpressCMS/impresscms (Product, product)
- www.vulncheck.com/advisories/impresscms-unrestricted-file-upload (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2022-50912?
- CVE-2022-50912 is a critical-severity vulnerability in Impresscms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-01-13.
- How severe is CVE-2022-50912?
- Critical severity. CVSS v3 base score is 9.8 out of 10.