CVE-2026-3243 danbilabs CVE debrief

Who should care

Users of the Advanced Members for ACF plugin for WordPress, particularly those with Subscriber-level access and above, should be aware of this vulnerability and take steps to mitigate it. This includes updating the plugin to a patched version, restricting access to the create_crop function, and monitoring server logs for suspicious activity. Additionally, implementing compensating controls and reviewing security measures can help prevent exploitation.

Technical summary

The Advanced Members for ACF plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the create_crop function. This allows authenticated attackers with Subscriber-level access and above to delete arbitrary files on the server, potentially leading to remote code execution. The vulnerability exists in all versions up to, and including, 1.2.5. The plugin does not adequately restrict access to the create_crop function, making it a significant risk for WordPress installations using this plugin.

Defensive priority

High

Recommended defensive actions

• Update the Advanced Members for ACF plugin to a version that patches this vulnerability.
• Restrict access to the create_crop function to prevent unauthorized file deletion.
• Monitor server logs for suspicious file deletion activity.
• Implement additional security measures to prevent remote code execution.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The vulnerability was partially patched in version 1.2.5 of the Advanced Members for ACF plugin. However, the patch may not be comprehensive, and additional security measures should be taken. The create_crop function in the plugin does not properly validate file paths, allowing attackers to delete arbitrary files. This could lead to remote code execution if critical files like wp-config.php are deleted. Defenders should verify the patch and review server logs for suspicious activity.

Official resources