CVSS 3.1 Score 6.1 of 10 (medium)


Published Nov 27, 2023
Updated: Nov 30, 2023


CVE-2023-5560 is a vulnerability affecting the WP-UserOnline WordPress plugin before version 2.88.3. It allows unauthenticated users to execute Cross-Site Scripting attacks due to the lack of sanitization and escaping of the X-Forwarded-For header. The vulnerability has a base severity rating of MEDIUM with a CVSS score of 6.1, indicating a moderate level of risk. Exploitation requires network access and user interaction is required. The impact on integrity and confidentiality is low, while availability is not affected. Remediation involves updating the plugin to version 2.88.3 or later to mitigate the risk of this vulnerability in an organization's WordPress installation.

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