CVE-2025-8562 Overview
CVE-2025-8562 is a path traversal vulnerability in the Custom Query Shortcode plugin for WordPress. The flaw affects all versions up to and including 0.4.0 and stems from unsanitized input in the lens parameter. Authenticated users with Contributor-level access or higher can read arbitrary files on the underlying server. Exposed files may contain configuration data, credentials, or other sensitive information used elsewhere in the environment. The issue is tracked under [CWE-22] Improper Limitation of a Pathname to a Restricted Directory. Wordfence published the vulnerability analysis referenced in the NVD advisory.
Critical Impact
Authenticated contributors can read arbitrary files on the WordPress host through the lens shortcode parameter, exposing configuration files such as wp-config.php and other sensitive server-side content.
Affected Products
- Custom Query Shortcode plugin for WordPress, all versions up to and including 0.4.0
- WordPress installations with the plugin active and Contributor-level accounts provisioned
- Any site that permits untrusted contributor registrations while running this plugin
Discovery Timeline
- 2025-08-25 - CVE-2025-8562 published to the National Vulnerability Database
- 2026-06-17 - Last updated in the NVD database
Technical Details for CVE-2025-8562
Vulnerability Analysis
The Custom Query Shortcode plugin exposes a shortcode that accepts a lens parameter used to load a template or view file. The plugin does not normalize or restrict the value before resolving it against a file path on disk. An attacker who can insert or edit a post, which Contributor role allows, can embed the shortcode with traversal sequences to reference files outside the intended template directory. When the post is rendered, the plugin reads the referenced file and returns its contents to the requester.
The attack requires only low-privilege authentication and no user interaction. Because the plugin executes server-side during rendering, the attacker receives file contents rather than a browser-executed payload, making this an information disclosure issue rather than a code execution or integrity flaw.
Root Cause
The root cause is missing input validation on the lens shortcode attribute inside the plugin's initialization logic. The plugin concatenates user-controlled input into a file path without canonicalizing the result or enforcing a base directory allowlist. Traversal sequences such as ../ are therefore honored by the underlying filesystem call, mapping the request outside the plugin's template directory.
Attack Vector
Exploitation is network-based and requires an authenticated session with Contributor privileges or higher. The attacker publishes or previews content containing the vulnerable shortcode with a crafted lens value pointing at a target file such as wp-config.php. Rendering the content returns the file's contents in the response. See the WordPress Plugin Init File and the Wordfence Vulnerability Analysis for the specific code path.
Detection Methods for CVE-2025-8562
Indicators of Compromise
- Post or page revisions authored by Contributor accounts that contain the plugin's shortcode with a lens attribute referencing ../ sequences or absolute paths
- Web server access logs showing preview or render requests to posts immediately followed by outbound responses containing configuration file markers such as DB_PASSWORD
- Unexpected reads of sensitive files by the PHP worker process during shortcode rendering
Detection Strategies
- Inspect the wp_posts and wp_postmeta tables for shortcode invocations that include traversal characters in the lens parameter
- Alert on web requests whose response bodies contain strings characteristic of wp-config.php, /etc/passwd, or private key headers
- Correlate contributor account activity with post preview endpoints and unusual response sizes
Monitoring Recommendations
- Enable WordPress audit logging to capture post creation, updates, and preview requests by non-administrator roles
- Forward web server and PHP-FPM logs to a centralized analytics platform to search for traversal patterns across sites
- Track newly registered Contributor accounts and flag those that immediately publish or preview content containing shortcodes
How to Mitigate CVE-2025-8562
Immediate Actions Required
- Deactivate the Custom Query Shortcode plugin until a patched release is available and verified in your environment
- Audit Contributor and higher role accounts and remove any that are inactive, untrusted, or unrecognized
- Rotate credentials contained in wp-config.php, including database passwords and authentication salts, if exploitation is suspected
Patch Information
At the time of the NVD advisory, all versions through 0.4.0 are affected. Review the WordPress Changeset #3348818 and the GitHub Pull Request for the upstream fix, and consult the WordPress Developer Resource for release status before upgrading.
Workarounds
- Restrict user registration and disable the Contributor role on sites where it is not operationally required
- Deploy a web application firewall rule that blocks requests whose bodies contain the plugin's shortcode combined with ../ sequences
- Apply filesystem permissions that prevent the web server user from reading sensitive files outside the WordPress document root
# Configuration example: WAF rule pattern to block traversal in the lens parameter
# ModSecurity-style rule (illustrative)
SecRule ARGS|REQUEST_BODY "@rx lens\s*=\s*[\"'][^\"']*\.\./" \
"id:1008562,phase:2,deny,status:403,log,msg:'CVE-2025-8562 path traversal attempt in custom-query-shortcode lens parameter'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
