The JS Morisset JSM file_get_contents() Shortcode plugin for WordPress versions up to 2.7.1 contains a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This flaw allows an attacker with low privileges and requiring user interaction to execute arbitrary scripts in the context of the victim's browser, potentially impacting confidentiality, integrity, and availability. The vulnerability is tracked as CVE-2025-58653 with a CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L). No patch or vendor advisory is currently provided, and no known exploits have been reported.

Successful exploitation of this vulnerability can lead to stored XSS attacks, enabling attackers to execute arbitrary scripts in users' browsers. This may result in partial loss of confidentiality, integrity, and availability of affected systems or data. The attack requires low privileges and user interaction, and the scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the vulnerable shortcode functionality or disabling the plugin if feasible. Monitor vendor channels for updates or patches addressing this vulnerability.