by Kastro
Paper/Archive/CVE-2026-6257

CVE-2026-6257

Vvveb Vvveb CMS — Vvveb CMS < v1.0.8.2 Remote Code Execution via Media Management

EPSS 0.6%CVSS 9.2
critical.is priorityof 100
38
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 50.3.503 × 2010.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Vvveb CMS before 1.0.8.2 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows authenticated attackers to rename files to blocked extensions .php or .htaccess. Attackers can exploit this logic flaw by first uploading a text file and renaming it to .htaccess to inject Apache directives that register PHP-executable MIME types, then uploading another file and renaming it to .php to execute arbitrary operating system commands as the www-data user.

Affected

ProductAffectedFixed inSource
Vvveb CMS< 1.0.8.21.0.8.2CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchgithub.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2writeupvulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management