What’s Vulnerable › Vulnerabilities

CVE-2023-30777: WordPress Advanced Custom Fields / Advanced Custom Fields PRO plugins <= 6.1.5 vulnerable to Cross Site Scripting (XSS)

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 39.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-05-10 · updated 2026-06-17
• Weakness: CWE-79

Description

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

Affected products

• WP Engine Advanced Custom Fields: before 6.1.6 — fixed in 6.1.6

How to fix

Upgrade to a fixed version: WP Engine Advanced Custom Fields 6.1.6. Check the vendor advisory for mitigations.

References

• https://patchstack.com/articles/reflected-xss-in-advanced-custom-fields-plugins-affecting-2-million-sites?_s_id=cve
• https://patchstack.com/database/vulnerability/advanced-custom-fields-pro/wordpress-advanced-custom-fields-pro-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
• https://patchstack.com/database/vulnerability/advanced-custom-fields/wordpress-advanced-custom-fields-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
• https://patchstack.com/articles/reflected-xss-in-advanced-custom-fields-plugins-affecting-2-million-sites?_s_id=cve
• https://patchstack.com/database/vulnerability/advanced-custom-fields-pro/wordpress-advanced-custom-fields-pro-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
• https://patchstack.com/database/vulnerability/advanced-custom-fields/wordpress-advanced-custom-fields-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

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