CVE-2021-24637: Fonts Plugin < 3.0.3 - Contributor+ Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-20 · updated 2026-06-17
Weakness: CWE-79

Description

The Google Fonts Typography WordPress plugin before 3.0.3 does not escape and sanitise some of its block settings, allowing users with as role as low as Contributor to perform Stored Cross-Site Scripting attacks via blockType (combined with content), align, color, variant and fontID argument of a Gutenberg block.

Affected products

Fonts Plugin Fonts: before 3.0.3 — fixed in 3.0.3

How to fix

Upgrade to a fixed version: Fonts Plugin Fonts 3.0.3. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/dd2b3f22-5e8b-41cf-bcb8-d2e673e1d21e
https://wpscan.com/vulnerability/dd2b3f22-5e8b-41cf-bcb8-d2e673e1d21e

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