Vvveb RCE: Authenticated Users Can Achieve Unauthenticated Code Execution
The National Vulnerability Database has disclosed CVE-2026-41934, a high-severity (CVSS 8.8) authenticated remote code execution vulnerability affecting Vvveb versions prior to 1.0.8.2. This flaw resides in the admin code editor, allowing low-privilege authenticated users to execute arbitrary code due to insufficient restrictions on file extensions.
Attackers with editor, author, contributor, or site_admin roles can leverage this vulnerability by writing a malicious .htaccess file. This file maps arbitrary extensions to the PHP handler. Subsequently, the attacker can upload PHP code using that newly mapped extension. The National Vulnerability Database warns that this setup enables unauthenticated remote code execution once the malicious file is accessed via HTTP.
This isn’t just a low-privilege RCE; it’s a critical escalation path. An attacker who gains even basic authenticated access can weaponize this to achieve full system compromise, potentially without needing further authentication for subsequent attacks. The CWE-184 classification points to a fundamental flaw in how file extensions are handled and validated, a common pitfall that often leads to severe consequences.
What This Means For You
- If your organization uses Vvveb, patch to version 1.0.8.2 or later immediately. Review your Vvveb user roles and permissions, especially for editor, author, contributor, and site_admin accounts. Audit web server logs for suspicious `.htaccess` file modifications or unexpected file uploads in Vvveb directories.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41934 - Vvveb Authenticated RCE via Malicious .htaccess Upload
title: CVE-2026-41934 - Vvveb Authenticated RCE via Malicious .htaccess Upload
id: scw-2026-05-06-ai-1
status: experimental
level: critical
description: |
Detects the creation of .htaccess files within the Vvveb uploads directory, a key step in exploiting CVE-2026-41934. This allows low-privilege authenticated users to map arbitrary extensions to the PHP handler, paving the way for unauthenticated RCE.
author: SCW Feed Engine (AI-generated)
date: 2026-05-06
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-41934/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: file_event
detection:
selection:
TargetFilename|endswith:
- '.htaccess'
selection_2:
TargetFilename|contains:
- '/wp-content/uploads/'
condition: selection AND selection_2
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41934 | RCE | Vvveb < 1.0.8.2 |
| CVE-2026-41934 | RCE | Admin code editor |
| CVE-2026-41934 | RCE | Insufficient file extension restrictions |
| CVE-2026-41934 | Misconfiguration | Malicious .htaccess file upload to map arbitrary extensions to PHP handler |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 06, 2026 at 22:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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