The Jakir Hasan Blocks Post Grid plugin for WordPress versions up to 1.0.3 contains a DOM-based Cross-site Scripting vulnerability due to improper input neutralization during web page generation. This vulnerability allows an attacker with low privileges to craft input that, when processed by the plugin, can execute malicious scripts in the victim's browser context. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, user interaction, and impacts on confidentiality, integrity, and availability at a low to low level. No patch or official fix has been disclosed as of the publication date.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of a victim's browser, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability. The attack requires user interaction and low privileges, limiting the ease of exploitation. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to the plugin or disabling it if feasible. Monitor vendor channels for updates and apply patches promptly once released.