CVE-2026-3535 DSGVO Google Web Fonts GDPR <= 1.1 - Unauthenticated Arbitrary File Upload via 'fonturl' Parameter
Unauthenticated attackers can upload arbitrary files, including PHP webshells, leading to remote code execution on sites using specific themes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3535?
CVE-2026-3535 is a critical vulnerability in mlfactory DSGVO Google Web Fonts GDPR, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The DSGVO Google Web Fonts GDPR plugin for WordPress is vulnerable to arbitrary file upload due to missing file type validation in the `DSGVOGWPdownloadGoogleFonts()` function in all versions up to, and including, 1.1. The function is exposed via a `wp_ajax_nopriv_` hook, requiring no authentication. It fetches a user-supplied URL as a CSS file, extracts URLs from its content, and downloads those files to a publicly accessible directory without validating the file type. This makes it possible for unauthenticated attackers to upload arbitrary files including PHP webshells, leading to remote code execution. The exploit requires the site to use one of a handful of specific themes (twentyfifteen, twentyseventeen, twentysixteen, storefront, salient, or shapely).
Weakness: CWE-434
Which versions are affected by CVE-2026-3535?
How do I fix CVE-2026-3535?
No fix has been published for CVE-2026-3535 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-3535 being exploited?
There is no known exploitation of CVE-2026-3535 in the wild and no public exploit code.
Sources
Also known as GHSA-x9xw-x29g-m332.