Arbitrary file upload in Givanz Vvveb

CVE-2026-41937

Vvveb before 1.0.8.3 contains an unrestricted file upload vulnerability in the plugin upload endpoint that allows super_admin users to execute arbitrary PHP code by uploading a malicious plugin ZIP file. Attackers can craft a ZIP containing a plugin.php with a valid Slug header and a public/index.php file with arbitrary PHP code, which executes as the web server user once accessed via subsequent unauthenticated HTTP requests to the plugin's public path.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-41937: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

  • Givanz Vvveb — versions 0, 04f0294350ec429e307cd31c2e777a4797c868d6

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-41937?
CVE-2026-41937 is a high-severity vulnerability in Givanz Vvveb, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 7.2/10. Published 2026-05-14.
How severe is CVE-2026-41937?
High severity. CVSS v3 base score is 7.2 out of 10.