CVE-2021-24587: Splash Header < 1.20.8 - Authenticated Stored Cross-Site Scripting (XSS)

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 Splash Header WordPress plugin before 1.20.8 doesn't sanitise and escape some of its settings while outputting them in the admin dashboard, leading to an authenticated Stored Cross-Site Scripting issue.

Affected products

Splash Header: before 1.20.8 — fixed in 1.20.8

How to fix

Upgrade to a fixed version: Splash Header 1.20.8. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/bb5d94ad-e1ce-44e2-8403-d73fe75a146a
https://wpscan.com/vulnerability/bb5d94ad-e1ce-44e2-8403-d73fe75a146a

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