The vulnerability CVE-2026-22355 affects the Simple XML Sitemap plugin by gregmolnar, where a CSRF flaw enables an attacker to inject stored XSS payloads. This can occur because the plugin does not adequately verify the origin of requests, allowing malicious requests to be executed with the privileges of an authenticated user. The affected versions include all versions up to 1.3. The CVSS v3.1 score of 7.1 indicates a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability can lead to stored XSS attacks, potentially allowing attackers to execute arbitrary scripts in the context of the affected site. This can compromise user data confidentiality, integrity, and availability. The high CVSS score reflects significant risk, though no known exploits in the wild have been reported yet.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor the vendor's communications for updates. Until a fix is available, consider disabling or restricting access to the affected plugin to reduce exposure.