CVE-2026-34429

MEDIUM EPSS 19.8%
Published Apr 20, 20262mo ago · Modified Jun 17, 20261w ago
5.1 CVSS 4.0
Medium
Find Similar
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
19.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 5

  • delta.cyberm.ca https://delta.cyberm.ca/bugbin/ur66bvB7BYTC9y0eCIk3uzhZQgbjzAkG/
  • github.com https://github.com/givanz/Vvveb/commit/cc997d3359ea5e49a45c132f5dee3bc80fb441d7
  • github.com https://github.com/givanz/Vvveb/releases/tag/1.0.8.1
  • github.com https://github.com/givanz/Vvveb/security/advisories/GHSA-2vc4-49hq-g7f4
  • vulncheck.com https://www.vulncheck.com/advisories/vvveb-stored-xss-via-media-upload-and-rename

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.