# CVE-2026-5615: givanz Vvvebjs cross-site scripting in upload.php

Source: https://junglewise.ai/threats/cve-2026-5615-givanz-vvvebjs-cross-site-scripting-in-upload-php  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-06. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-5615 · Severity: medium · CVSS 4.3 · Published 2026-04-06

Vvvebjs is a drag-and-drop page builder library used to create web content. A security flaw in its file upload component allows attackers to upload malicious files that can execute scripts in a user's browser. This could lead to unauthorized actions being performed on behalf of users or the theft of sensitive session information.

Technologies: [Givanz VvvebJs](https://junglewise.ai/threats/technologies/vvvebjs). Vendors: [Givanz](https://junglewise.ai/threats/vendors/givanz).

## Quick answers

**Is CVE-2026-5615 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5615 being exploited in the wild.

**How severe is CVE-2026-5615?** Medium severity, with a CVSS score of 4.3, published 6 April 2026.

**Which products and versions are affected?** Givanz VvvebJs up to 2.0.5.

**Is there a fix for CVE-2026-5615?** A patch was published on 2026-04-06. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-5615 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-5615?** Check whether you run Givanz VvvebJs at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A cross-site scripting (XSS) vulnerability exists in the upload.php file of the Vvvebjs File Upload Endpoint. The root cause is the inclusion of the 'svg' extension in the $uploadAllowExtensions whitelist, which allows attackers to upload SVG files containing malicious JavaScript. When a user or administrator views the uploaded file, the script executes in the context of their browser session. This is a remote attack requiring minimal user interaction. The issue has been addressed in commit 8cac22cff99b8bc701c408aa8e887fa702755336 by removing 'svg' from the allowed extensions list.

## Affected products

- givanz Vvvebjs up to 2.0.5

## Timeline

- 2026-04-06: disclosed
- 2026-04-06: advisory
- 2026-04-06: patched

## References

- [https://github.com/givanz/VvvebJs/](https://github.com/givanz/VvvebJs/)
- [https://github.com/givanz/VvvebJs/commit/8cac22cff99b8bc701c408aa8e887fa702755336](https://github.com/givanz/VvvebJs/commit/8cac22cff99b8bc701c408aa8e887fa702755336)
- [https://tcn60zf28jhk.feishu.cn/wiki/Cr4KwMPiMi65fFkI9Vyc3oX2n0f?from=from_copylink](https://tcn60zf28jhk.feishu.cn/wiki/Cr4KwMPiMi65fFkI9Vyc3oX2n0f?from=from_copylink)
- [https://vuldb.com/submit/785563](https://vuldb.com/submit/785563)
- [https://vuldb.com/vuln/355406](https://vuldb.com/vuln/355406)
- [https://vuldb.com/vuln/355406/cti](https://vuldb.com/vuln/355406/cti)

## Related threats

- [Givanz Vvveb unrestricted file upload in plugin upload endpoint](https://junglewise.ai/threats/cve-2026-41937-givanz-vvveb-unrestricted-file-upload-in-plugin-upload-endpoint)
- [Vvveb uncontrolled recursion in admin controller dispatch cycle](https://junglewise.ai/threats/cve-2026-41935-vvveb-uncontrolled-recursion-in-admin-controller-dispatch-cycle)
- [Vvveb information disclosure in cron controller](https://junglewise.ai/threats/cve-2026-41928-vvveb-information-disclosure-in-cron-controller)
- [Vvveb code injection in installation endpoint](https://junglewise.ai/threats/cve-2026-39918-vvveb-code-injection-in-installation-endpoint)
- [Givanz Vvveb stored XSS via media upload and rename bypass](https://junglewise.ai/threats/cve-2026-34429-givanz-vvveb-stored-xss-via-media-upload-and-rename-bypass)