---
id: CVE-2026-34429
title: Vvveb < 1.0.8.1 Stored XSS via Media Upload and Rename
summary: "Vvveb prior to\_1.0.8.1 contains a stored cross-site scripting vulnerability that allows authenticated users with media upload and rename permissions to execute arbitrary JavaScript by bypassing MIME type validation and renaming uploaded …"
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: givanz
product: Vvveb
affected:
  - Vvveb < 1.0.8.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-04-20T14:50:07.310752Z'
exploitAvailable: true
published: '2026-04-20'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:02:09.210Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-34429'
references:
  - url: 'https://delta.cyberm.ca/bugbin/ur66bvB7BYTC9y0eCIk3uzhZQgbjzAkG/'
  - url: 'https://github.com/givanz/Vvveb/security/advisories/GHSA-2vc4-49hq-g7f4'
    label: GitHub Security Advisory (GHSA-2vc4-49hq-g7f4)
  - url: 'https://github.com/givanz/Vvveb/releases/tag/1.0.8.1'
    label: Vvveb 1.0.8.1 Release Notes
  - url: >-
      https://github.com/givanz/Vvveb/commit/cc997d3359ea5e49a45c132f5dee3bc80fb441d7
  - url: >-
      https://www.vulncheck.com/advisories/vvveb-stored-xss-via-media-upload-and-rename
tags:
  - cve.org
  - exploit-available
epss: 0.00281
epssPercentile: 0.20683
ingestedAt: '2026-11-08T14:51:22.453Z'
---

## Overview

Vvveb prior to 1.0.8.1 contains a stored cross-site scripting vulnerability that allows authenticated users with media upload and rename permissions to execute arbitrary JavaScript by bypassing MIME type validation and renaming uploaded files to executable extensions. Attackers can prepend a GIF89a header to HTML/JavaScript payloads to bypass upload validation, rename the file to .html extension, and execute malicious scripts in an administrator's browser session to create backdoor accounts and upload malicious plugins for remote code execution.

## Affected

- `Vvveb < 1.0.8.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.