CVE-2018-25324 Unknown Vendor CVE debrief

Who should care

WordPress administrators, site operators running the Simple Fields plugin, and defenders responsible for legacy PHP environments should treat this as a file-disclosure risk with possible higher impact in unsafe configurations.

Technical summary

The vulnerability is a local file inclusion flaw associated with the wp_abspath parameter in simple_fields.php. According to the supplied description and NVD record, unauthenticated attackers can supply crafted values to read arbitrary files such as /etc/passwd. The issue is tied to null-byte handling on PHP versions before 5.3.4, and the supplied description states that code execution may be possible in environments where allow_url_include is enabled.

Defensive priority

High priority for any internet-facing WordPress installation still using Simple Fields 0.2 through 0.3.5, especially if the host runs an old PHP stack or contains sensitive local files accessible to the web process.

Recommended defensive actions

• Confirm whether Simple Fields is installed and whether any instance is within the affected version range 0.2 through 0.3.5.
• Remove or upgrade the plugin if it is no longer needed; if no fixed version is available in your environment, disable it.
• Review server PHP versions and eliminate unsupported legacy versions, particularly anything older than PHP 5.3.4.
• Audit web server and application logs for unexpected requests to simple_fields.php or unusual wp_abspath values.
• Check for signs of local file disclosure exposure on the host, including access to sensitive configuration files.
• Harden PHP and web-server settings so dangerous include behavior is not available in production.
• If the plugin must remain in place temporarily, restrict access to the affected application paths and segment the host from sensitive data.

Evidence notes

This debrief is grounded in the supplied NVD record, which lists the weakness as CWE-98 and describes the issue as a local file inclusion in Simple Fields. The provided description and references identify the affected range as 0.2 through 0.3.5 and point to the plugin homepage, the plugin archive, a VulnCheck advisory, and an Exploit-DB entry. No exploit steps are included here.

Official resources