Arbitrary File Deletion Vulnerability in wpForo Forum Plugin by WordPress
CVE-2026-3666

8.8HIGH

Key Information:

Vendor

WordPress
Status
WPforo Forum
Vendor
CVE Published:
4 April 2026

What is CVE-2026-3666?

The wpForo Forum plugin for WordPress is susceptible to arbitrary file deletion due to inadequate validation of file names and paths, which allows attackers with subscriber-level access or higher to exploit path traversal sequences. By embedding malicious path strings into forum post bodies, an attacker can delete arbitrary files on the server, thereby posing a significant security risk. This vulnerability affects all versions of the wpForo Forum plugin up to and including 2.4.16.

Affected Version(s)

wpForo Forum 0 <= 2.4.16

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset?old_path=wpf...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Craig Smith
Leonid Semenenko
.