Description
WordPress Plugin PostX-Gutenberg Blocks for Post Grid is prone to multiple vulnerabilities, including cross-site scripting and security bypass vulnerabilities. Exploiting these issues may allow an attacker to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site, to steal cookie-based authentication credentials, or to perform otherwise restricted actions and subsequently modify/delete/add ultp_options values, or read password-protected or private posts. WordPress Plugin PostX-Gutenberg Blocks for Post Grid version 2.4.9 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 2.4.10 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:5375BD3E-A30D-4F24-9B17-470B28A8231C
https://sploitus.com/exploit?id=WPEX-ID:5F2FE510-7513-4D33-82D9-3107B3B3F2AE
https://sploitus.com/exploit?id=WPEX-ID:AF14AC23-843D-4F80-BEAF-237618109EDD
https://sploitus.com/exploit?id=WPEX-ID:8D966FF1-9C88-43C7-8F4B-93C88E214677
https://plugins.svn.wordpress.org/ultimate-post/trunk/readme.txt