by Kastro
Paper/Archive/CVE-2026-39918

CVE-2026-39918

givanz Vvveb — Vvveb < 1.0.8.1 Code Injection via Installation Endpoint

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 51.8.518 × 2010.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Vvveb prior to 1.0.8.1 contains a code injection vulnerability in the installation endpoint where the subdir POST parameter is written unsanitized into the env.php configuration file without escaping or validation. Attackers can inject arbitrary PHP code by breaking out of the string context in the define statement to achieve unauthenticated remote code execution as the web server user.

Affected

ProductAffectedFixed inSource
Vvveb< 1.0.8.11.0.8.1CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/givanz/Vvveb/releases/tag/1.0.8.1patchgithub.com/givanz/Vvveb/commit/5162c1639130bd080ab63c7d856788cd59d6b3b7writeupvulncheck.com/advisories/vvveb-code-injection-via-installation-endpoint