EUVD-2026-39968
GHSA-hhrc-vf2p-x5h3
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Network AJAX endpoint (AV:N), simple case-bypass (AC:L), requires a Subscriber account (PR:L), no user interaction; arbitrary deletion gives high integrity/availability impact but no confidentiality (C:N).
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
The Frontend File Manager Plugin plugin for WordPress is vulnerable to Authenticated Arbitrary File Deletion in versions up to and including 23.6. This is due to a case-sensitive bypass of the wpfm_dir_path parameter sanitization in the wpfm_file_meta_update AJAX handler, where supplying WPFM_DIR_PATH in uppercase evades the unset check and is normalized to wpfm_dir_path by sanitize_key() during update_post_meta(), allowing an attacker to overwrite the stored file path with an arbitrary filesystem path that is then passed directly to unlink() in delete_file_locally() without any directory containment validation. This makes it possible for authenticated attackers with Subscriber-level access to delete arbitrary files on the server, including sensitive files such as wp-config.php, potentially leading to full site takeover.
AnalysisAI
Authenticated arbitrary file deletion in the Frontend File Manager Plugin (nmedia-user-file-uploader) for WordPress versions through 23.6 lets Subscriber-level users delete any file on the server, including wp-config.php, which can cascade into full site takeover. The flaw stems from a case-sensitivity gap in input sanitization within the wpfm_file_meta_update AJAX handler that allows attacker-controlled paths to reach unlink() unchecked. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated account at Subscriber level or higher, which on default WordPress means the target site must have user self-registration enabled (or the attacker must otherwise obtain any low-privilege account). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H, score 8.1) indicates a network-reachable, low-complexity attack requiring only low privileges and no user interaction, with high integrity and availability impact and no confidentiality impact - consistent with arbitrary file deletion rather than data theft (note the 'Information Disclosure' tag appears mislabeled given C:N and the actual delete primitive). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a low-privileged Subscriber account on a WordPress site with open registration, then sends a crafted admin-ajax.php POST to the wpfm_file_meta_update action supplying the directory path under the uppercase key WPFM_DIR_PATH pointing at an absolute path such as /var/www/html/wp-config.php. The handler's sanitization bypass causes that path to be stored and later passed to unlink(), deleting the file; removing wp-config.php can force WordPress into a fresh-install state that the attacker uses to reconfigure the site against an attacker-controlled database, yielding full takeover. … |
| Remediation | Update the Frontend File Manager Plugin to the first release after 23.6 that addresses this issue (the input does not include an exact fixed version, so confirm the patched version via the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/506006ce-7b1c-4f9d-93f3-abc87abea2bb and the plugin changelog before deploying) - no vendor-released patch version is independently confirmed from the provided data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Immediately disable the nmedia-user-file-uploader plugin across all WordPress instances; verify wp-config.php and other critical files remain intact; audit file access logs for unauthorized deletions from Subscriber-level accounts. …
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External POC / Exploit Code
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