// For flags

CVE-2021-24977

Use Any Font < 6.2.1 - Unauthenticated Arbitrary CSS Appending

Severity Score

6.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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

El plugin Use Any Font | Custom Font Uploader de WordPress versiones anteriores a 6.2.1, no presenta ninguna comprobación de autorización cuando se asigna una fuente, permitiendo a usuarios no autenticados enviar CSS arbitrarios que luego serán procesados por el frontend para todos los usuarios. Debido a una falta de saneo y escape en el backend, también podría conllevar a problemas de tipo XSS Almacenado.

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 send 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

*Credits: Krzysztof Zając
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-14 CVE Reserved
  • 2022-01-31 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-862: Missing Authorization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Use Any Font Project
Search vendor "Use Any Font Project"
 Use Any Font
Search vendor "Use Any Font Project" for product "Use Any Font"
 < 6.2.1
Search vendor "Use Any Font Project" for product "Use Any Font" and version " < 6.2.1"
wordpress
Affected