CVE-2026-6817 is a stored cross-site scripting vulnerability in the Quiz Maker by AYS WordPress plugin affecting all versions up to 6.7.1.29. The vulnerability is due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of the 'rate_reason' parameter. This allows unauthenticated attackers to inject arbitrary web scripts that execute in the context of users viewing the injected pages. The CVSS 3.1 score is 5.8 (medium severity) with network attack vector, low attack complexity, no privileges required, no user interaction, and a scope change. No official fix or patch has been published yet.

Successful exploitation enables unauthenticated attackers to perform stored cross-site scripting attacks, potentially leading to script execution in the context of users visiting the affected pages. This can result in limited confidentiality impact (e.g., theft of cookies or session tokens). There is no impact on integrity or availability reported. No known active exploitation has been observed.

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 disabling or restricting use of the vulnerable parameter if possible. Monitor official vendor channels for updates and patches. Avoid relying on generic mitigations as they may not fully address this specific vulnerability.