CVE-2021-24977: Use Any Font < 6.2.1 - Unauthenticated Arbitrary CSS Appending

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-02-28 · updated 2026-06-17
Weakness: CWE-862

Description

The Use Any Font | Custom Font Uploader WordPress plugin before 6.2.1 does not have any authorisation checks when assigning a font, allowing unauthenticated users to sent arbitrary CSS which will then be processed by the frontend for all users. Due to the lack of sanitisation and escaping in the backend, it could also lead to Stored XSS issues

Affected products

Dnesscarkey Use Any Font | Custom Font Uploader (WordPress plugin): before 6.2.1 — fixed in 6.2.1

How to fix

Upgrade to a fixed version: Dnesscarkey Use Any Font | Custom Font Uploader (WordPress plugin) 6.2.1. Check the vendor advisory for mitigations.

References

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