PT-2026-33774 · Givanz · Vvveb

Hamed Kohi + 1 · Published 2026-04-20 · Updated 2026-04-20 · CVE-2026-34429

Mitre

CVSS v3.1

5.4

Medium

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-34429

Affected Products

Vvveb

References · 4

• 🔥 https://delta.cyberm.ca/bugbin/ur66bvB7BYTC9y0eCIk3uzhZQgbjzAkG · Exploit
• https://github.com/givanz/Vvveb/commit/cc997d3359ea5e49a45c132f5dee3bc80fb441d7 · Patch
• https://vulncheck.com/advisories/vvveb-stored-xss-via-media-upload-and-rename · Note
• https://github.com/givanz/Vvveb/releases/tag/1.0.8.1 · Note