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**Name of the Vulnerable Software and Affected Versions** Nacos version 2.0.3 **Description** A Cross Site Scripting (XSS) issue exists in the auth/users endpoint via the `pageSize` and `pageSize` parameters, specifically through the `/auth/users` endpoint. **Recommendations** For Nacos version 2.0.3, consider restricting access to the `/auth/users` endpoint until a patch is available. As a temporary workaround, avoid using the `pageSize` and `pageNo` parameters in this endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.