Custom Fonts Plugin up to 2.1.16 on WordPress theme.json BCF_Google_Fonts_Compatibility authorization

Summaryinfo

A vulnerability classified as critical has been found in Custom Fonts Plugin up to 2.1.16 on WordPress. Affected by this issue is the function BCF_Google_Fonts_Compatibility of the file theme.json. The manipulation leads to authorization. This vulnerability is uniquely identified as CVE-2025-14351. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Custom Fonts Plugin up to 2.1.16 on WordPress. It has been rated as critical. This issue affects the function BCF_Google_Fonts_Compatibility of the file theme.json. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is:

The Custom Fonts – Host Your Fonts Locally plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'BCF_Google_Fonts_Compatibility' class constructor function in all versions up to, and including, 2.1.16. This makes it possible for unauthenticated attackers to delete font directory and rewrite theme.json file.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2025-14351. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/20/2026).

By approaching the search of inurl:theme.json it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Name

• Custom Fonts Plugin

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.1.12
• 2.1.13
• 2.1.14
• 2.1.15
• 2.1.16

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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