Description

Unauthenticated Local File Inclusion in Theme Test Drive <= 2.9.1 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-08-18T14:17:03.530Z",
  "pubdate": "2026-08-18T14:17:03.530Z",
  "executiveSummary": "An unauthenticated Local File Inclusion (LFI) vulnerability has been identified in the Theme Test Drive plugin affecting versions 2.9.1 and prior. This security flaw enables remote, unauthenticated threat actors to traverse the filesystem and include arbitrary local files residing on the underlying server running the vulnerable WordPress installation.\nThe risk implications are severe, as successful exploitation may lead to sensitive data exposure, including configuration files, system logs, and potentially source code, depending on the permissions of the web server process. The attack vector requires no prior authentication or privileged access to the affected web application, allowing arbitrary HTTP requests to trigger the vulnerable functionality directly over the network.\nExploitation requirements are minimal, relying solely on network connectivity to the target endpoint hosting the vulnerable Theme Test Drive component and the presence of predictable or traversable file paths within the execution context of the PHP application.\nThe impact compromises the confidentiality and integrity of the hosting environment, underscoring the critical need for immediate remediation through updating or disabling the vulnerable software component.",
  "technicalDetails": "The vulnerability exists within the Theme Test Drive plugin up to version 2.9.1, specifically stemming from inadequate input sanitization and validation of parameters utilized in file inclusion operations.\nThe root cause is the improper handling of user-supplied input passed directly to PHP filesystem inclusion functions, such as include, require, include_once, or require_once, without sufficient restriction to a secure base directory or white-listed file set.\nNetwork exposure is direct, as the vulnerable component handles unauthenticated HTTP requests exposed via the web interface. Attackers do not require any authentication requirements or privilege requirements to interact with the vulnerable endpoint.\nThe attack flow proceeds as follows: First, the unauthenticated threat actor identifies the target endpoint within the Theme Test Drive plugin that processes parameters associated with theme selection or file loading. Second, the attacker crafts a malicious HTTP request injecting directory traversal sequences (such as ../) into the vulnerable parameter to escape the intended web root directory. Third, the application evaluates the tainted input and passes the resulting path directly to the underlying file inclusion mechanism.\nPayload behavior involves the retrieval and processing of arbitrary local files present on the filesystem. If the file contains executable PHP code and the server configuration permits, execution of arbitrary code may occur. Otherwise, the contents of the target file may be reflected in the HTTP response, resulting in arbitrary file read capabilities.\nPost-exploitation impact includes the potential disclosure of sensitive system files, such as /etc/passwd, database credentials stored in configuration files, or other proprietary application data, facilitating further compromise of the web application and underlying operating system."
}