A Vulnerability Chain in WordPress Core Could Allow for Remote Code Execution

A vulnerability chain has been discovered in WordPress Core that could allow for remote code execution. WordPress is an open-source content management system (CMS) used to design, build, and publish personal and commercial websites. Successful exploitation of vulnerability chain could allow for remote code execution in the context of the affected service account. Depending on the privileges associated with the service account, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Services whose accounts are configured to have less rights on the system could be less impacted than those who operate with administrative user rights.

Cybersecurity news outlets are reporting public proof-of-concepts available. The MS-ISAC SOC has also observed telemetry that indicate automated scanning and exploitation for this vulnerability chain against membership.

A vulnerability chain has been discovered in WordPress Core that could allow for remote code execution. An unauthenticated, anonymous user can remotely exploit this chain by crafting and sending a SQL injection via HTTP POST request with parameters not sanitized by affected systems. Details of these vulnerabilities are as follows:

Tactic:Initial Access (TA0001)

Technique:Exploit Public-Facing Application (T1190)

Successful exploitation of these vulnerabilities could allow for Remote Code Execution in the context of the affected service account. Depending on the privileges associated with the service account an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Services whose accounts are configured to have fewer rights on the system could be less impacted than those who operate with administrative rights.

We recommend the following actions be taken:

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