DSGVO Google Web Fonts GDPR <= 1.1 - Unauthenticated Arbitrary File Upload via 'fonturl' Parameter

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Summary

CVECVE-2026-3535
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-08 07:16:21 UTC
Updated2026-04-08 21:26:35 UTC
DescriptionThe 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).

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.002840000 probability, percentile 0.518210000 (date 2026-04-10)

Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mlfactory DSGVO Google Web Fonts GDPR affected 1.1 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/dsgvo-google-web-fonts-gdpr/tags/1.1/dsgvo-google-web... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/dsgvo-google-web-fonts-gdpr/trunk/dsgvo-google-web-fo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/dsgvo-google-web-fonts-gdpr/tags/1.1/dsgvo-google-web... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/dsgvo-google-web-fonts-gdpr/trunk/dsgvo-google-web-fo... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/6203ffaf-5efd-4c66-85f0-cc3a0... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Nabil Irawan (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-07T17:40:04.000ZDisclosed
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