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Description

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.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-20 | Updated 2026-04-20 | Assigner VulnCheck




CRITICAL: 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

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-94 Improper Control of Generation of Code ('Code Injection')

Product status

Default status
unaffected

Any version before 1.0.8.1
affected

5162c1639130bd080ab63c7d856788cd59d6b3b7 (git)
unaffected

Credits

Mohammed EL OUARDANI (sh4dowalker) finder

VulnCheck coordinator

References

github.com/givanz/Vvveb/releases/tag/1.0.8.1 release-notes

github.com/...ommit/5162c1639130bd080ab63c7d856788cd59d6b3b7 patch

www.vulncheck.com/...ode-injection-via-installation-endpoint third-party-advisory

cve.org (CVE-2026-39918)

nvd.nist.gov (CVE-2026-39918)

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