Arbitrary file upload in Givanz Vvveb
CVE-2026-41938
Vvveb before version 1.0.8.2 contains an unrestricted file upload vulnerability in the media upload handler that allows authenticated users with media-upload permissions to bypass extension restrictions by uploading a .htaccess file to map .phtml extensions to the PHP handler. Attackers can upload a .phtml file containing arbitrary PHP code and execute the uploaded payload through a subsequent unauthenticated HTTP GET request to the uploaded file, resulting in remote code execution with web server privileges.
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: 0.010 (62.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.010 · change: +0.005
Affected products
- Givanz Vvveb — versions 0
Weakness classification (CWE)
References
- github.com/givanz/Vvveb/releases/tag/1.0.8.2 (release-notes)
- github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g (vendor-advisory)
- github.com/givanz/Vvveb/commit/54a9e846fb94192f1b31ae81d81d25c874662e6a (patch)
- www.vulncheck.com/advisories/vvveb-rce-via-media-upload-handler (third-party-advisory)
Frequently asked questions
- What is CVE-2026-41938?
- CVE-2026-41938 is a high-severity vulnerability in Givanz Vvveb, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-06.
- How severe is CVE-2026-41938?
- High severity. CVSS v3 base score is 8.8 out of 10.