CVE-2025-49403: WordPress Premium Age Verification Plugin Arbitrary File Download

Technical summary

CVE-2025-49403 is an unauthenticated arbitrary file download vulnerability stemming from improper file handling (CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program). The vulnerability exists in Premium Age Verification / Restriction for WordPress versions 3.0.2 and earlier. The flaw permits unauthenticated remote attackers to retrieve files from the server without authentication, leading to unauthorized information disclosure. The attack vector is network-based with low attack complexity, requiring no user interaction or privileges.

Business impact

Organizations using the affected plugin face exposure of sensitive data including WordPress configuration files (wp-config.php), database credentials, private user information, and potentially intellectual property stored within the web root. This can lead to unauthorized access to databases, lateral movement into backend systems, and compliance violations (GDPR, HIPAA, PCI-DSS) if personal or payment data is exposed. The ease of exploitation and lack of authentication requirement makes this a high-priority threat.

Affected systems

Premium Age Verification / Restriction plugin for WordPress in versions 3.0.2 and earlier. Any WordPress installation with this plugin active is at risk, particularly those running outdated versions. The vulnerability is not limited to specific hosting environments or WordPress configurations.

Exploitability

This vulnerability is trivial to exploit. No authentication is required, attack complexity is low, and the attack is entirely network-based. An attacker requires only basic knowledge of the plugin's file handling mechanisms and standard HTTP requests to download files. The lack of user interaction requirement means exploitation can be fully automated, making this a high-risk issue for any unpatched instance.

Remediation

Immediately update the Premium Age Verification / Restriction plugin to a version newer than 3.0.2 that addresses this vulnerability. If an immediate patch is unavailable, disable or remove the plugin until a fix is released. Conduct a file access audit to determine if any sensitive files were accessed or downloaded during the vulnerability window. Review server access logs for suspicious file download patterns and check for unauthorized database access.

Patch guidance

Update the plugin through the WordPress admin dashboard (Plugins > Installed Plugins > check for updates) or manually download the patched version from the WordPress plugin repository. Verify the installed version is confirmed as patched by checking against the vendor advisory or release notes. After updating, clear any caching layers and test the plugin functionality to ensure normal operations. Organizations unable to patch immediately should consider running the site in a restricted-access environment or using Web Application Firewall (WAF) rules to block suspicious file requests.

Detection guidance

Monitor web server logs (Apache access.log, nginx access.log) for HTTP requests containing suspicious file paths or traversal patterns targeting common sensitive files (wp-config.php, .htaccess, wp-settings.php, database files). Look for GET requests with parameters commonly used in file inclusion attacks. Implement file integrity monitoring (FIM) to detect unauthorized reads or changes to sensitive configuration files. In WordPress security plugins (Wordfence, Sucuri), check for alerts related to the affected plugin. Network IDS/IPS systems should be configured to detect patterns matching known exploitation of this vulnerability once signatures become available.

Why prioritize this

This vulnerability merits immediate remediation due to its HIGH CVSS score (7.5), unauthenticated attack vector, low complexity, and potential for massive data exfiltration. The lack of authentication requirement and ease of exploitation make it suitable for mass exploitation. Any organization running the affected plugin is at immediate risk of confidential data exposure with minimal attacker effort.

Risk score, explained

The CVSS 3.1 score of 7.5 (HIGH) reflects: Network-accessible attack vector with low complexity, no privileges or user interaction required, and high confidentiality impact. While integrity and availability are not impacted, the confidentiality breach alone justifies the high severity rating, as file download attacks can expose database credentials, private keys, and business-critical data.

Frequently asked questions