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Servers and applications · WordPress plugins

CVE-2021-24241

Advanced Custom Field Pro: Cross-site Scripting

Severity
Medium 6.1
Published
20 Jan 2021
Last changed
17 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
5.9.1
Also known as
WPV-9d5270fbd92f
Sources
NVD, WPVulnerability

Description

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.

Affected software

SoftwareAffected versions
Advanced Custom FieldsServers and applications · cpe:a:advancedcustomfields:advanced_custom_fields
  • Every version before 5.9.1
Advanced Custom Fields Pro (WordPress plugin)WordPress plugins · wp-plugin:advanced-custom-fields-pro
  • Every version before 5.9.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-24241
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-24241
  • Wordfence https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/in3-marketing/advanced-custom-fields-pro-590-reflected-cross-site-scripting