CVE-2026-6257CRITICAL 9.1EPSS p45.6%

CVE-2026-6257CVE-2026-6257

Description

Vvveb CMS v1.0.8.2 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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS0.63% probability of exploitation · percentile 45.6% · 2026-06-19T12:03:05Z
Published2026-04-20
Last modified2026-05-26

Underlying weaknesses· 1

CWE-434

References

  1. https://github.com/givanz/Vvveb/commit/6fb8eaa998265e33e8802cbc220d8859dbc144f2
  2. https://www.vulncheck.com/advisories/vvveb-cms-remote-code-execution-via-media-management

1

TypeTargetConfidenceTier
WeaknessUnrestricted Upload of File with Dangerous Typecwe-4340%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-6249
CVE
CVE-2026-41938
CVE
CVE-2026-41934
CVE
CVE-2025-44022
CVE
CVE-2025-9397
CVE
CVE-2026-39918
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.