CVE-2023-53903 WebsiteBaker 2.13.3 Stored Cross-Site Scripting via SVG File Upload

Medium 5.1 Published 16 Dec 2025 Updated 7 Apr 2026

Authenticated attackers can upload malicious SVG files to execute persistent JavaScript, potentially leading to session hijacking or site defacement.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-53903?

CVE-2023-53903 is a medium-severity cross-site scripting vulnerability in WebsiteBaker, published on 16 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

WebsiteBaker 2.13.3 contains a stored cross-site scripting vulnerability that allows authenticated users to upload malicious SVG files with embedded JavaScript. Attackers can upload crafted SVG files with script tags that execute when the file is viewed, enabling persistent cross-site scripting attacks.

Weakness: CWE-79

Which versions are affected by CVE-2023-53903?

It affects 1 product.

Products include Websitebaker Websitebaker.

How do I fix CVE-2023-53903?

No fix has been published for CVE-2023-53903 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-53903 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53903 exists.

Sources

Also known as GHSA-9qcf-r8v3-qr8c.