by Kastro
Paper/Archive/CVE-2026-126378

CVE-2026-126378

givanz Vvveb — Vvveb through 1.0.8.6 Webshell Upload via Theme Installer validFile() Bypass

CVSS 9.4
critical.is priorityof 100
28
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

Vvveb through 1.0.8.6 contains a file upload vulnerability in the theme installer validFile() function that uses strpos() instead of strict path matching. Attackers with admin credentials can upload a ZIP containing a PHP file whose path includes /theme.php to achieve remote code execution on nginx deployments.

Affected

ProductAffectedFixed inSource
Vvveb≤ 1.0.8.6–CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

advisorygithub.com/givanz/Vvveb/security/advisories/GHSA-xpgr-r6c8-3hpqwriteupvulncheck.com/advisories/vvveb-through-1.0.8.6-webshell-upload-via-theme-installer-validfile-bypass