Neil Liu

**Name of the Vulnerable Software and Affected Versions** EXCELLENT INFOTEK BiYan versions 1.57 through 2.8 **Description** The issue allows an attacker to leak user information, specifically passwords, without authentication. This is achieved by sending an `EMP NO` element to the "kws login/asp/query user.asp" API endpoint and then reading the `PWD` element. **Recommendations** For versions 1.57 through 2.8, consider restricting access to the "kws login/asp/query user.asp" API endpoint to prevent unauthorized password leaks. As a temporary workaround, avoid using the `EMP NO` element in this endpoint until a fix is available.

**Name of the Vulnerable Software and Affected Versions** EXCELLENT INFOTEK BiYan versions 1.57 through 2.8 **Description** The issue allows an attacker to leak user information without authentication by sending a `LOGIN ID` element to the "auth/main/asp/check user login info.aspx" API endpoint and then reading the response. This can be demonstrated by accessing the `KW EMAIL` or `KW TEL` field. **Recommendations** For versions 1.57 through 2.8, as a temporary workaround, consider restricting access to the "auth/main/asp/check user login info.aspx" API endpoint to minimize the risk of exploitation. Avoid using the `LOGIN ID` element in this endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.