CVE-2026-34429: Vvveb < 1.0.8.1 Stored XSS via Media Upload and Rename
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34429?
CVE-2026-34429 has a high severity due to its potential for stored cross-site scripting attacks.
How do I fix CVE-2026-34429?
To fix CVE-2026-34429, upgrade Vvveb to version 1.0.8.1 or later.
Who is affected by CVE-2026-34429?
CVE-2026-34429 affects authenticated users of Vvveb versions prior to 1.0.8.1 with media upload and rename permissions.
What type of vulnerability is CVE-2026-34429?
CVE-2026-34429 is a stored cross-site scripting (XSS) vulnerability.
Can I exploit CVE-2026-34429 without authentication?
Exploiting CVE-2026-34429 requires authentication due to the permissions needed for media upload and rename.