CVE-2026-34429

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.4 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N                                    

Vulnerability Description

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.

Vulnerability Details

Published Date

April 20, 2026

Last Modified

April 20, 2026

CWE ID

CWE-79

Source

NVD

Vendor

givanz

Product

Vvveb

External References

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

CVE-2026-34429

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

Discussion (0)

Add Comment