CVE-2021-24437: Favicon by RealFaviconGenerator <= 1.3.20 - Reflected Cross-Site Scripting (XSS)

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-30 · updated 2026-06-17
Weakness: CWE-79

Description

The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator.

Affected products

Favicon by RealFaviconGenerator: before 1.3.22 — fixed in 1.3.22

How to fix

Upgrade to a fixed version: Favicon by RealFaviconGenerator 1.3.22. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9
https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9

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