Arbitrary file upload in Kalyan02 Nanocms
CVE-2022-50898
NanoCMS 0.4 contains an authenticated file upload vulnerability that allows remote code execution through unvalidated page content creation. Authenticated attackers can upload PHP files with arbitrary code to the server's pages directory by exploiting the page creation mechanism without proper input sanitization.
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: 0.013 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.001
Affected products
- Kalyan02 Nanocms — versions 0.4
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50997 (Exploit, exploit)
- github.com/kalyan02/NanoCMS (Product, product)
- github.com/ishell/Exploits-Archives/blob/master/2009-exploits/0904-exploits/nan… (Third Party Advisory, exploit)
- www.vulncheck.com/advisories/nanocms-remote-code-execution-rce-authenticated (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2022-50898?
- CVE-2022-50898 is a high-severity vulnerability in Kalyan02 Nanocms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-01-13.
- How severe is CVE-2022-50898?
- High severity. CVSS v3 base score is 8.8 out of 10.