CVE-2025-69035: 
WordPress vulnerability analysis and mitigation

CVE-2025-69035 is a PHP Object Injection vulnerability (Deserialization of Untrusted Data) in the strongholdthemes Dental Care CPT WordPress plugin. It affects all versions through 20.2 and was published on January 22, 2026, with Patchstack reporting the discovery on December 30, 2025. The vulnerability was originally reported by researcher Phat RiO on April 26, 2025. It carries a CVSS v3.1 base score of 8.8 (High) (Patchstack, Feedly).

The vulnerability is classified as CWE-502 (Deserialization of Untrusted Data), mapped to CAPEC-586 (Object Injection). The plugin fails to safely handle serialized PHP data, allowing an authenticated attacker with low-level privileges (Contributor or Developer role) to inject malicious serialized objects into the application. If a suitable PHP Object Property (POP) chain exists within the WordPress environment, this can be leveraged to achieve code injection, SQL injection, path traversal, or denial of service. No user interaction is required beyond authentication (Patchstack, Feedly).

Successful exploitation allows an authenticated attacker to execute arbitrary code, compromise data integrity, and disrupt system availability on the affected WordPress installation. The vulnerability exposes confidentiality (unauthorized access to sensitive data), integrity (modification of critical data), and availability (denial of service) — all rated High in the CVSS scoring. The scope is limited to the affected system, but a full site compromise could enable lateral movement within shared hosting environments or further attacks on site visitors (Patchstack, Feedly).

There is no public proof-of-concept exploit available, and no evidence of in-the-wild exploitation has been reported at this time. The EPSS score is 0.024% (very low probability of exploitation in the near term). The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. However, Patchstack notes that vulnerabilities of this class (CVSS 8.8, PHP Object Injection) are frequently used in mass-exploit campaigns targeting WordPress sites at scale (Patchstack, Feedly).

1. Reconnaissance: Identify WordPress sites running the Dental Care CPT plugin (version ≤ 20.2) using tools like WPScan, Shodan, or by inspecting plugin directories exposed via the target site.
2. Obtain low-privilege access: Register or compromise an account with at least Contributor or Developer role on the target WordPress site.
3. Identify the vulnerable input: Locate the plugin functionality that accepts and deserializes user-supplied serialized PHP data (e.g., a form field, shortcode parameter, or AJAX endpoint handled by the plugin).
4. Craft a malicious serialized payload: Identify a usable POP chain within the WordPress installation (leveraging installed themes, plugins, or WordPress core classes) and construct a serialized PHP object payload that triggers the desired action (e.g., remote code execution, file write).
5. Inject the payload: Submit the crafted serialized object through the vulnerable input vector while authenticated.
6. Achieve objective: If a valid POP chain is present, the deserialized object triggers the chain, resulting in arbitrary code execution, data exfiltration, or other malicious outcomes (Patchstack).

• Logs: WordPress access logs showing authenticated POST requests to plugin-specific endpoints or AJAX handlers (wp-admin/admin-ajax.php) with unusual serialized data patterns (e.g., O:<length>:"<classname>" in request bodies.
• File System: Unexpected new PHP files or modified plugin/theme files in the WordPress installation directory; web shells placed in wp-content/uploads/ or plugin directories.
• Logs: PHP error logs showing deserialization-related warnings or fatal errors involving unexpected class instantiation.
• Process: Unusual child processes spawned by the web server process (e.g., bash, curl, wget) indicating successful code execution via a POP chain.
• Network: Outbound connections from the web server to unknown external IPs, potentially indicating reverse shell or data exfiltration activity (Patchstack).

No official patch from the plugin vendor (strongholdthemes) is currently available for Dental Care CPT. Site administrators should immediately deactivate and remove the plugin if it is not essential. Patchstack has issued a virtual patch (mitigation rule) for Patchstack-protected sites to block exploitation attempts until an official fix is released. Additional mitigations include restricting Contributor/Developer role access to trusted users only, implementing a web application firewall (WAF) with PHP deserialization detection, and monitoring for suspicious serialized data in requests (Patchstack).

Patchstack classified this as a medium-priority vulnerability and issued a virtual mitigation rule, noting that PHP Object Injection vulnerabilities of this CVSS score class are commonly leveraged in mass WordPress exploit campaigns. The vulnerability was covered in the Wordfence Intelligence Weekly WordPress Vulnerability Report for the period of December 15, 2025 to January 4, 2026 (Wordfence). No significant broader media coverage or notable researcher commentary beyond these security vendor reports has been identified.