WordPress Plugin Vulnerabilities
Simply Schedule Appointments < 1.5.7.7 - Admin+ Stored Cross-Site Scripting
Description
The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
Proof of Concept
Navigate to style settings: https://example.com/wp-admin/admin.php?page=simply-schedule-appointments%2F#/ssa/settings/styles Put the following payload as "CUSTOM CSS": </style><script>alert(1)</script> The XSS will be triggered in pages/posts where the shortcode for any appointment ([ssa_booking type=]) is embed
Affects Plugins
Fixed in version 1.5.7.7
References
Classification
Miscellaneous
Original Researcher
Raad Haddad of Cloudyrion GmbH
Submitter
Raad Haddad of Cloudyrion GmbH
Submitter twitter
Verified
Yes
Timeline
Publicly Published
2022-08-08 (about 9 months ago)
Added
2022-08-08 (about 9 months ago)
Last Updated
2023-04-12 (about 1 months ago)