CVE-2020-35938 : Security Advisory and Response
Learn about CVE-2020-35938, a vulnerability in the Post Grid plugin for WordPress allowing remote attackers to inject PHP objects. Find mitigation steps here.
PHP Object injection vulnerabilities in the Post Grid plugin before 2.0.73 for WordPress allow remote authenticated attackers to inject arbitrary PHP objects due to insecure unserialization of data supplied in a remotely hosted crafted payload in the source parameter via AJAX. The action must be set to post_grid_import_xml_layouts.
Understanding CVE-2020-35938
This CVE involves PHP object injection vulnerabilities in the Post Grid plugin for WordPress, enabling remote authenticated attackers to inject arbitrary PHP objects.
What is CVE-2020-35938?
CVE-2020-35938 is a security vulnerability in the Post Grid plugin for WordPress that allows remote authenticated attackers to inject arbitrary PHP objects through insecure unserialization of data.
The Impact of CVE-2020-35938
The vulnerability has a CVSS base score of 7.5 (High severity) with significant impacts on confidentiality, integrity, and availability of the affected systems.
Technical Details of CVE-2020-35938
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability arises from insecure unserialization of data supplied in a remotely hosted crafted payload in the source parameter via AJAX in the Post Grid plugin.
Affected Systems and Versions
- Affected Product: Post Grid plugin
- Vulnerable Versions: Before 2.0.73
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Exploitation Impact: High on confidentiality, integrity, and availability
Mitigation and Prevention
Protecting systems from CVE-2020-35938 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update the Post Grid plugin to version 2.0.73 or newer.
- Monitor and restrict access to the vulnerable AJAX functionality.
Long-Term Security Practices
- Regularly update all plugins and software to the latest versions.
- Implement strong authentication mechanisms for remote access.
Patching and Updates
- Apply security patches promptly to all WordPress plugins and themes.