CVE-2026-49112 Overview
CVE-2026-49112 is an unauthenticated path traversal vulnerability affecting the Shared Files WordPress plugin in versions up to and including 1.7.64. The flaw is classified under CWE-35: Path Traversal: '.../...//' and allows remote attackers to access files outside the intended directory without any authentication. Successful exploitation results in disclosure of sensitive files from the underlying web server filesystem. The vulnerability is exploitable over the network with low attack complexity and requires no user interaction.
Critical Impact
Unauthenticated remote attackers can read arbitrary files accessible to the web server process, exposing configuration files, credentials, and other sensitive data stored on WordPress hosts running vulnerable Shared Files plugin versions.
Affected Products
- WordPress Shared Files plugin versions <= 1.7.64
- WordPress installations with the Shared Files plugin enabled
- Hosting environments serving the vulnerable plugin to public users
Discovery Timeline
- 2026-06-15 - CVE-2026-49112 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-49112
Vulnerability Analysis
The Shared Files plugin exposes file-handling endpoints that accept user-controlled path components without sufficient validation. Because the affected request handlers operate prior to any authentication check, any unauthenticated visitor can supply traversal sequences in request parameters. The plugin then resolves these sequences against the server filesystem and returns the contents of the targeted file. The attack vector is the network, and exploitation requires no privileges or user interaction.
The issue affects confidentiality directly. Integrity and availability are not impacted by the flaw itself, but disclosed data such as wp-config.php, private keys, or backup archives can enable follow-on attacks against the WordPress instance and connected services.
Root Cause
The root cause is improper limitation of a pathname to a restricted directory, mapped to CWE-35. The plugin fails to canonicalize and validate user-supplied file identifiers before reading from disk. Sequences such as .../...// or repeated ../ segments bypass naive sanitization routines that strip only a single traversal pattern.
Attack Vector
An attacker crafts an HTTP request to the vulnerable plugin endpoint, supplying a path parameter containing traversal sequences that resolve outside the plugin's upload directory. The web server, executing as the WordPress process user, reads and returns the file contents. No login, token, or nonce is required. Refer to the Patchstack WordPress Vulnerability Advisory for additional technical context.
Detection Methods for CVE-2026-49112
Indicators of Compromise
- HTTP requests to Shared Files plugin endpoints containing ../, .../...//, or URL-encoded traversal sequences such as %2e%2e%2f.
- Web server access logs showing successful 200 responses to requests targeting plugin file-download handlers with abnormal path parameters.
- Outbound reads of sensitive files such as wp-config.php, /etc/passwd, or backup archives correlated with plugin request URIs.
Detection Strategies
- Inspect WordPress access logs for requests to Shared Files plugin paths containing encoded or stacked traversal patterns.
- Deploy web application firewall rules that block path traversal payloads targeting plugin query parameters and POST bodies.
- Correlate plugin request activity with subsequent authentication anomalies that may indicate credential theft from leaked configuration files.
Monitoring Recommendations
- Enable verbose logging on the WordPress reverse proxy or WAF to capture full query strings for plugin endpoints.
- Alert on file reads by the web server process targeting files outside wp-content/uploads/ or the plugin's designated storage directory.
- Track plugin version inventory across WordPress sites and flag instances at or below version 1.7.64.
How to Mitigate CVE-2026-49112
Immediate Actions Required
- Update the Shared Files plugin to a version later than 1.7.64 as soon as a patched release is available from the vendor.
- Disable or remove the Shared Files plugin on any WordPress site where an updated version cannot be applied immediately.
- Rotate credentials, API keys, and salts stored in wp-config.php if exploitation is suspected based on log review.
Patch Information
Consult the Patchstack WordPress Vulnerability Advisory for the fixed version and upgrade guidance. Apply the vendor-supplied update through the WordPress plugin manager or via WP-CLI to remediate the path traversal handling.
Workarounds
- Block requests containing traversal patterns at the web application firewall or reverse proxy layer until the plugin is updated.
- Restrict access to the plugin's file-handling endpoints using IP allowlists where the plugin must remain enabled.
- Apply filesystem permissions that prevent the web server user from reading sensitive files outside the WordPress document root.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
