CVE-2026-6257Exploit

MEDIUMCVSS 9.2 · CRITICAL

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Patch affected systems immediately
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD 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.

4.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-434

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Public PoC and exploit tooling are both present
  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Exploit tool or code specified in 1 signal
  • PoC mentioned or linked in 1 signal
  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-04-20); latest day: 1
  • 3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-20: 2Mentions · 2026-04-21: 1PoC Mentioned / Linked · 2026-04-20: 1Exploit Tool / Code · 2026-04-20: 1Patch / Workaround · 2026-04-20: 1Technical Details · 2026-04-20: 2Technical Details · 2026-04-21: 104-2004-21
Signal classification3 categories
Exploit
133.3%
Patch
133.3%
Disclosure
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-04-202
Exploit1Patch1
2026-04-211
Disclosure1
Full discourse3 posts
  • Orizon@OrizonCyber
    Patch

    🚨 CVE-2026-6257 — CVSS 9.1/10 █████████░ Vvveb CMS v1.0.8 contains a remote code execution vulnerability in its media management functionality where a missing... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/OdIi8TpQX5

    Post summary

    Vvveb CMS v1.0.8 is vulnerable to a remote code‑execution flaw (CVE‑2026‑6257) with a CVSS score of 9.1; a patch is released to mitigate the critical vulnerability.

    1000045
    28 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-6257 Vvveb CMS v1.0.8 contains a remote code execution vulnerability in its media management functionality where a missing return statement in the file rename handler allows… https://www.cve.org/CVERecord?id=CVE-2026-6257

    Post summary

    The post discloses a remote code execution flaw in Vvveb CMS v1.0.8, describing the vulnerability’s technical roots in its media management module.

    00000104
    57.2K followersView on X
  • 0day Signal@0dayPublishing
    Exploit

    🚨 CVE-2026-6257: Vvveb CMS v1.0.8 Remote Code Exec... Missing return statement turns file rename validation into a joke—upload txt, rename to .htaccess, inject MIME types, th... https://zerodaysignal.com/vulnerability/CVE-2026-6257 #netsec #vulnerability #CVE #sysadmin #zeroday

    Post summary

    CVE-2026-6257 in Vvveb CMS v1.0.8 allows remote code execution through a flaw in file rename validation; the post outlines the exploitation technique and links to a detailed vulnerability page.

    0000083
    218 followersView on X

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