The Simply Schedule Appointments plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.12.32 via the 'recursive' parameter. This makes it possible for unauthenticated attackers to extract customer PII — including names, email addresses, phone numbers, and custom form field data — stored in appointment records, as well as per-appointment public_token values. The leaked per-appointment public_token values also enable unauthenticated attackers to delete arbitrary appointments via the DELETE /wp-json/ssa/v1/appointments/{id} endpoint, which accepts the token as sole authorization.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
croixhaug:simply schedule appointments
References 9
https://www.wordfence.com/threat-intel/vulnerabilities/id/1984f80e-06ec-4d7f-9a…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.…
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https://plugins.trac.wordpress.org/changeset/3709365/simply-schedule-appointmen…
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