| Package | Affected versions | Patched versions |
|---|---|---|
| wp-useronline | < 2.88.3 | 2.88.3 |
The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks.
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