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CVE-2020-11025: Authenticated cross-site scripting (XSS) in WordPress Customizer

• Severity: medium (CVSS 5.4 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: none known
• Published: 2020-04-30 · updated 2026-06-17
• Weakness: CWE-79

Description

In affected versions of WordPress, a cross-site scripting (XSS) vulnerability in the navigation section of Customizer allows JavaScript code to be executed. Exploitation requires an authenticated user. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33).

Affected products

• Debian Linux: 9.0, 10.0
• WordPress: from 4.7 before 5.4.1 — fixed in 5.4.1

How to fix

Upgrade to a fixed version: WordPress 5.4.1. Check the vendor advisory for mitigations.

References

• https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-4mhg-j6fx-5g3c
• https://wordpress.org/support/wordpress-version/version-5-4-1/#security-updates
• https://www.debian.org/security/2020/dsa-4677
• https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-4mhg-j6fx-5g3c
• https://wordpress.org/support/wordpress-version/version-5-4-1/#security-updates
• https://www.debian.org/security/2020/dsa-4677

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