CVE-2025-30889 in Testimonial Slider Plugin
Summary
by MITRE • 04/03/2025
Deserialization of Untrusted Data vulnerability in PickPlugins Testimonial Slider allows Object Injection. This issue affects Testimonial Slider: from n/a through 2.0.13.
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Analysis
by VulDB Data Team • 04/03/2025
The CVE-2025-30889 vulnerability represents a critical deserialization flaw in the PickPlugins Testimonial Slider plugin for WordPress, classified under the CWE-502 weakness category which specifically addresses deserialization of untrusted data. This vulnerability exists within the plugin's object injection handling mechanism, where user-supplied data is improperly processed without adequate validation or sanitization. The affected version range spans from an unspecified starting point through version 2.0.13, indicating that any installation within this scope could be compromised by an attacker exploiting this weakness. The vulnerability arises when the plugin receives serialized data from external sources, particularly through user input fields or API endpoints, without implementing proper security measures to verify the integrity and origin of such data.
The technical exploitation of this vulnerability enables attackers to inject malicious objects during the deserialization process, potentially allowing for remote code execution or arbitrary code execution within the context of the affected WordPress installation. When the plugin processes untrusted serialized data, it can inadvertently execute malicious code embedded within the serialized object structure, leading to complete system compromise. This type of vulnerability is particularly dangerous because it can be leveraged to bypass traditional security controls and gain unauthorized access to the web server hosting the vulnerable WordPress site. The attack vector typically involves crafting malicious serialized data that, when processed by the vulnerable plugin, triggers the execution of attacker-controlled code.
The operational impact of CVE-2025-30889 extends beyond simple data compromise, as successful exploitation can result in complete takeover of the affected WordPress installation. Attackers can leverage this vulnerability to install backdoors, steal sensitive data, modify content, or use the compromised system as a launching point for further attacks within the network. The vulnerability affects not only the immediate WordPress environment but also potentially impacts any associated systems or services that rely on the compromised site for operations. Organizations using the affected plugin versions face significant risk of data breaches, service disruption, and potential regulatory compliance violations, particularly in environments where sensitive customer or business data is stored.
Mitigation strategies for CVE-2025-30889 should focus on immediate remediation through plugin updates to version 2.0.14 or later, which should contain patches addressing the deserialization vulnerability. System administrators should also implement additional security measures including input validation, output encoding, and the principle of least privilege for plugin functionality. The implementation of web application firewalls and security monitoring solutions can help detect and prevent exploitation attempts. Organizations should conduct thorough security assessments of their WordPress installations to identify any other vulnerable plugins or components that may be susceptible to similar deserialization attacks. Regular security updates and patch management procedures should be enforced to prevent future vulnerabilities of this nature from being exploited, aligning with best practices recommended in the ATT&CK framework for web application security and the OWASP Top Ten security risks.