Path Traversal in Tomdever Wpforo Forum

CVE-2026-6248

The wpForo Forum plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to and including 3.0.5. This is due to two compounding flaws: the Members::update() method does not validate or restrict the value of file-type custom profile fields, allowing authenticated users to store an arbitrary path instead of a legitimate upload path; and the wpforo_fix_upload_dir() sanitization function in ucf_file_delete() only remaps paths that match the expected pattern, and it is passed directly to the unlink() function. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Note: The vulnerability requires a file custom field, which requires the wpForo - User Custom Fields addon plugin.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-6248: held from 0.009 to 0.006.

EPSS over last 30 days · oldest: 0.009 · newest: 0.006 · change: -0.004

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-6248?
CVE-2026-6248 is a high-severity vulnerability in Tomdever Wpforo Forum, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-04-20.
How severe is CVE-2026-6248?
High severity. CVSS v3 base score is 8.1 out of 10.