CVE-2025-58024: UnboundStudio Accordion FAQ Local File Inclusion Vulnerability – CVSS 7.5 HIGH

Technical summary

CVE-2025-58024 is a PHP Local File Inclusion vulnerability stemming from improper input validation in the Accordion FAQ plugin's file inclusion mechanism. The vulnerability maps to CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). Affected versions run from the earliest release through version 2.2.1. An authenticated user can manipulate filename parameters passed to PHP include or require statements, allowing traversal to arbitrary locations on the server filesystem and execution of code within the PHP context. The CVSS 3.1 score of 7.5 reflects high confidentiality and integrity impact with the requirement of authenticated access and non-trivial attack complexity.

Business impact

This vulnerability poses a significant insider threat and compromised-credential risk. An attacker with valid user account credentials—obtained through phishing, credential theft, or employee compromise—could access confidential data stored on the server, modify site content, or plant webshells for persistent access. Organizations relying on Accordion FAQ for content delivery face potential data exfiltration, defacement, and lateral movement into backend systems. The vulnerability is particularly dangerous in multi-tenant or shared hosting environments where file paths may be predictable.

Affected systems

UnboundStudio Accordion FAQ plugin versions from initial release through 2.2.1 are affected. The plugin is commonly used in WordPress and PHP-based content management systems for FAQ display. Any deployment using Accordion FAQ in this version range, combined with user authentication enabled, is vulnerable. Check your installed plugin version via the admin panel or plugin file headers.

Exploitability

Exploitation requires valid user credentials to access the plugin's functions. The attack complexity is rated as high, indicating that successful exploitation demands knowledge of server filesystem structure or common file paths (such as /etc/passwd on Linux or configuration files). However, once a user account is compromised or an insider acts maliciously, the barrier to exploitation is relatively low. No public exploit code is known to be in widespread circulation, but the vulnerability is straightforward to weaponize once discovered.

Remediation

Update Accordion FAQ to a patched version released after 2.2.1. Verify the exact patch version against UnboundStudio's official security advisory or plugin repository. As an interim control pending patching, restrict user role capabilities to prevent untrusted users from accessing plugin settings, implement file integrity monitoring on the server, and audit user account activity for suspicious file access patterns.

Patch guidance

Check UnboundStudio's official advisory or the WordPress plugin repository for the patched version number. Apply the update through your plugin management interface immediately after testing in a staging environment. Ensure all administrative accounts are secured with strong, unique passwords and multi-factor authentication to reduce the risk of credential compromise. Verify the update was successful by confirming the plugin version in the admin panel.

Detection guidance

Monitor web server and PHP logs for unusual include/require statements targeting files outside the plugin's expected directory (e.g., attempts to include /etc/passwd, /proc/self/environ, or ../../../ path traversal patterns). Look for POST or GET requests to the plugin with suspicious filename parameters. Audit user login sessions around the time of the vulnerability's publication; cross-reference with file access logs for anomalous activity. Enable detailed PHP error logging to capture failed or successful file inclusion attempts.

Why prioritize this

Although this vulnerability requires authentication, the HIGH CVSS score (7.5) and potential for data exfiltration and code execution warrant immediate prioritization. Compromised credentials are common in breach chains, making this a realistic attack vector. The widespread use of WordPress and FAQ plugins increases the attack surface. Organizations should treat this as a priority remediation within 1–2 weeks, especially if user roles beyond administrators are permitted to manage FAQ content.

Risk score, explained

The CVSS 3.1 score of 7.5 (HIGH) reflects: (1) High confidentiality impact—attackers can read arbitrary files from the server, (2) High integrity impact—ability to execute code and modify system state, (3) High availability impact—potential for denial of service through resource exhaustion, (4) Network accessibility—the plugin is reachable over the network, (5) Authentication requirement—reduces score from critical but does not eliminate threat given credential compromise prevalence, and (6) High attack complexity—requires knowledge of filesystem paths or trial-and-error, but not prohibitively difficult for a determined attacker.

Frequently asked questions