Advanced Custom Fields: Extended <= 0.8.9.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Vulnerability Description
The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'acfe_form' shortcode in versions up to, and including, 0.8.9.3 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- István Márton
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/dcbe0c72-d518-45d3-a220-896a51071b26?source=cve
- https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.8.9.3/includes/modules/form/module-form-front.php#L669
- https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.8.9.4/includes/modules/form/module-form-front.php#L669
- https://plugins.trac.wordpress.org/changeset/2972880/acf-extended#file4
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