Arbitrary file upload in Vvveb Cms
CVE-2026-6249
Vvveb CMS 1.0.8.2 contains a remote code execution vulnerability in its media upload handler that allows authenticated attackers to execute arbitrary operating system commands by uploading a PHP webshell with a .phtml extension. Attackers can bypass the extension deny-list and upload malicious files to the publicly accessible media directory, then request the file over HTTP to achieve full server compromise.
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: 0.008 (56.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.008 · change: +0.002
Affected products
- Vvveb Cms — versions 1.0.8, 1.0.8.2
Weakness classification (CWE)
References
- Patch Commit (patch)
- www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-upload (third-party-advisory)
Frequently asked questions
- What is CVE-2026-6249?
- CVE-2026-6249 is a high-severity vulnerability in Vvveb Cms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-04-20.
- How severe is CVE-2026-6249?
- High severity. CVSS v3 base score is 8.8 out of 10.