CVE-2026-104246: unknown contact form 7 signature addon Path Traversal

Vulnerability summary

CVE-2026-104246 is a medium (CVSS 5.9) Path Traversal vulnerability in unknown contact form 7 signature addon. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-10-2026
   PublishedVulnerability first disclosed.
2. 18-10-2026
   Last modifiedVulnerability information updated.

Description

The Contact Form 7 Signature Addon WordPress plugin through 4.2.2 does not sanitize a signature field value before building an email attachment path from it, allowing unauthenticated users to attach arbitrary files (bounded to wp-content on current Contact Form 7) to a form's outgoing email via path traversal; when a form is configured to email a copy to a submitter-controlled address, the attacker can read the targeted file.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.