CVE-2018-25437: CherryFramework Themes Information Disclosure Vulnerability

Technical summary

CVE-2018-25437 is a missing authentication vulnerability (CWE-306) in CherryFramework Themes 3.1.4. The download_backup.php endpoint in the /admin/data_management/ directory performs no authentication or authorization checks before serving backup archives. This allows unauthenticated remote attackers to directly access the script via HTTP request and retrieve ZIP files containing the full theme directory tree. The vulnerability has a CVSS 3.1 score of 7.5 (HIGH), reflecting the network-based attack vector, low complexity, and high confidentiality impact with no authentication requirement.

Business impact

An attacker exploiting this vulnerability gains visibility into proprietary theme customizations, custom hooks, API integrations, and internal structure that may be embedded in theme files. This intellectual property exposure could inform further attacks, such as identifying hardcoded credentials, plugin dependencies, or architectural weaknesses. Additionally, backup archives may inadvertently contain configuration files or remnants of sensitive data, expanding the blast radius beyond theme code alone. For organizations managing multiple WordPress sites on CherryFramework Themes, the exposure is multiplied across all affected instances.

Affected systems

WordPress installations running CherryFramework Themes version 3.1.4. Older versions may also be affected; verification against the vendor's advisory is recommended to determine the full scope of vulnerable versions. Any WordPress site using this theme family is directly at risk if hosted and accessible over the network.

Exploitability

Exploitability is trivial. No authentication is required, no user interaction is needed, and the attack is a simple HTTP GET request to a known endpoint. The absence of access controls on download_backup.php makes this a low-friction attack. Threat actors can automate reconnaissance across large numbers of WordPress installations to identify sites using the vulnerable theme and harvest backup files at scale.

Remediation

Immediately update CherryFramework Themes to a patched version released by the vendor. Verify the specific version number against the official vendor advisory. Pending patch deployment, disable or restrict access to the /admin/data_management/download_backup.php endpoint using web server rules (e.g., .htaccess, nginx configuration) or a Web Application Firewall. Review backup files already on the server for unauthorized access in logs. Consider rotating any credentials or API keys that may have been exposed in theme files or backups.

Patch guidance

Contact the CherryFramework theme vendor or check their official support portal for version 3.1.4 patch availability and upgrade instructions. Update through the WordPress dashboard or manually replace theme files with the patched version. Test the update in a staging environment first to ensure compatibility with child themes and customizations. After patching, remove any leftover backup files from the server.

Detection guidance

Monitor web server access logs for requests to /admin/data_management/download_backup.php, particularly those returning HTTP 200 status. Search for patterns such as GET requests to that endpoint without an authenticated session. File integrity monitoring tools can alert on unexpected ZIP file creation or deletion in theme directories. If using a Web Application Firewall, create a rule to block access to the endpoint. Review WordPress admin audit logs (if available via plugins) for automated theme backup operations that correlate with unauthorized access.

Why prioritize this

This vulnerability merits immediate attention because exploitation is trivial, requires no authentication, and directly exposes theme source code and potentially embedded secrets. The lack of active exploitation data (KEV status: false) does not diminish the risk; the low barrier to discovery and automated attack means threat actors are likely already probing for it. Any WordPress site using the affected theme version is vulnerable and should be patched or mitigated without delay.

Risk score, explained

The CVSS 3.1 score of 7.5 (HIGH) reflects a network-accessible vulnerability with no authentication required (AV:N/AC:L/PR:N), affecting confidentiality severely (C:H) but not integrity or availability. The absence of UI interaction required and universal scope (S:U) elevate the score. While not critical due to lack of impact on system functionality or availability, the ease of exploitation and direct exposure of sensitive intellectual property justify the HIGH severity rating.

Frequently asked questions