Overview
A high-severity directory traversal vulnerability has been disclosed in the CubeWP Framework plugin for WordPress, tracked as CVE-2026-13339 with a CVSS score of 7.5 (High). The flaw affects all versions up to and including 1.1.30 and enables unauthenticated attackers to read the contents of arbitrary files on the underlying server.
Vulnerability Details
The vulnerability exists within the cubewp_get_svg_content function, which is designed to retrieve SVG file content for rendering within the WordPress page builder. The function fails to properly sanitize or validate the file path supplied by the caller, making it susceptible to path traversal sequences (e.g., ../../../).
An unauthenticated attacker can craft a request targeting this function with a malicious file path that escapes the intended SVG directory and traverses to sensitive system files. Because the function operates without authentication checks, no user account or session is required to exploit the vulnerability.
Technical Summary
| Field | Details |
|---|---|
| CVE ID | CVE-2026-13339 |
| CVSS Score | 7.5 (High) |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | None |
| Availability Impact | None |
Affected Products
- CubeWP Framework plugin for WordPress
- All versions ≤ 1.1.30
Potential Impact
An attacker exploiting CVE-2026-13339 could read any file that the web server process has read permissions over. Common high-value targets include:
/etc/passwd— system user enumeration- WordPress
wp-config.php— database credentials, authentication keys, and salts .envfiles — API keys, secret tokens, third-party service credentials- SSH private keys if stored in accessible directories
- Server configuration files (Apache/Nginx configs, PHP configuration)
On shared hosting environments, this vulnerability can cascade into cross-account file disclosure, amplifying its real-world severity beyond the CVSS base score.
Recommended Actions
- Update immediately to CubeWP Framework version 1.1.31 or later once a patched release is published by the plugin vendor
- Disable or remove the CubeWP Framework plugin if the builder functionality is not critical and an update is unavailable
- Audit web server permissions to ensure the web server process cannot read sensitive files outside the webroot
- Review access logs for requests to the
cubewp_get_svg_contentfunction containing../path traversal sequences - Rotate secrets stored in
wp-config.phpand.envfiles if exploitation is suspected
Background: Path Traversal Vulnerabilities
Directory traversal (also known as path traversal) is a long-established class of vulnerability that arises when file path input is used without proper sanitization. Attackers exploit relative path components (../) to escape from a designated directory to any location the server process can access.
The correct remediation is to normalize the resolved path and verify it falls within the expected base directory before performing any file read operation. WordPress plugins that accept file path inputs — particularly those that serve file content directly to end users — must implement strict path canonicalization.