#VU47337 Deserialization of Untrusted Data in Post Grid and Gutenberg Blocks – ComboBlocks

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data passed via the "source" parameter in "post_grid_import_xml_layouts" function. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

External links

• https://wpvulndb.com/vulnerabilities/10420/
• https://www.wordfence.com/blog/2020/10/high-severity-vulnerabilities-in-post-grid-and-team-showcase-plugins/
• https://plugins.trac.wordpress.org/changeset/2383813/post-grid