The VikAppointments Services Booking Calendar plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the extract function in all versions up to, and including, 1.2.21. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires at least one File-type custom field to be published on the confirmation page shortcode, as this field is not created by default during plugin installation.
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
None
No data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 10
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/con…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/hel…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/site/hel…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.19/vikappoi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/con…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/hel…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/site/hel…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/vikappointments/tags/1.2.21/vikappoi…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&old=3721264%40vikappoint…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/75fc5df5-a774-4fe1-84…
security@wordfence.com