CVE-2021-24241

The Advanced Custom Fields Pro WordPress plugin before 5.9.1 did not properly escape the generated update URL when outputting it in an attribute, leading to a reflected Cross-Site Scripting issue in the update settings page.

• CWE-79

• https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
• https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
• https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory
• https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
• https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
• https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory

Published

Apr 22, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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