This vulnerability (CVE-2026-78264) affects Toolset Blocks, a component of Site Building with Toolset, allowing unauthenticated attackers to perform cross-site scripting (XSS) attacks. The flaw arises from improper input neutralization during web page generation, enabling injection of malicious scripts. The CVSS v3.1 score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No patch or official remediation level has been published as of the vulnerability disclosure date.

Successful exploitation could allow attackers to execute arbitrary scripts in the context of users visiting affected web pages, potentially leading to data disclosure, modification, or denial of service. The vulnerability affects confidentiality, integrity, and availability of the affected system. Since the vulnerability is unauthenticated, any remote attacker can attempt exploitation. However, user interaction is required to trigger the malicious script.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider applying temporary mitigations such as input validation or output encoding if feasible. Monitor vendor channels for updates and apply patches promptly once available.