Overview
On May 19, 2025, a critical vulnerability was disclosed under the identifier CVE-2025-47582. This vulnerability affects the WPBot Pro WordPress Chatbot plugin by QuantumCloud, in all versions up to and including 12.7.0. It involves a PHP Object Injection issue due to the unsafe deserialization of untrusted data. This flaw allows attackers to execute arbitrary code remotely and has received a CVSS v3.1 base score of 9.8 (Critical).
Technical Details
The core of the vulnerability lies in how the plugin handles serialized data. It fails to properly validate input before deserialization, making it possible for attackers to inject malicious PHP objects. This type of issue is categorized as CWE-502: Deserialization of Untrusted Data, which is a common and severe programming flaw in PHP applications.
Attackers can exploit this vulnerability to gain full control over the affected website, access sensitive information, alter functionality, or cause a complete service outage. The attack pattern aligns with CAPEC-586: Object Injection, highlighting the risks of allowing deserialization without strict controls.
CVSS Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector: Network – Can be exploited remotely.
- Attack Complexity: Low – No special conditions required.
- Privileges Required: None – No authentication needed.
- User Interaction: None – Fully automated attack possible.
- Confidentiality, Integrity, Availability: High – Complete system compromise possible.
Impacted Versions
All versions of WPBot Pro WordPress Chatbot up to and including 12.7.0 are affected. If you are using this plugin, immediate action is strongly recommended.
Discovery and Credit
This vulnerability was responsibly disclosed by Tran Nguyen Bao Khanh from VCI – VNPT. The advisory has been published and verified by Patchstack.
Mitigation Steps
- Update the WPBot Pro plugin to a version newer than 12.7.0, if available.
- If no patch is yet available, disable the plugin until a secure version is released.
- Consider deploying a Web Application Firewall (WAF) to mitigate attack attempts targeting serialized inputs.
Conclusion
PHP Object Injection vulnerabilities pose severe security threats, especially when they are exposed over the network without requiring authentication. Developers must avoid using unserialize() on user-supplied input or must implement robust validation controls. Website owners should maintain a regular update strategy and monitor vulnerability disclosures relevant to their stack.
For further information, consult the official advisory on Patchstack.