WordPress security changelog
HIGH CVE-2020-9372 Modified

Appointment Booking Calendar: Code execution

Appointment Booking Calendar is affected by code execution. Exposure depends on how the affected operation is made reachable by the site. Successful exploitation can run attacker-controlled code in the WordPress hosting account.

CVE / CNA score 7.8 CVSS · cve@mitre.org
NVD score 7.8 CVSS 3.1 · nvd@nist.gov
Component
Appointment Booking Calendar
Plugin slug
appointment-booking-calendar
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Mar 04, 2020
Weakness
CWE-1236 — Improper Neutralization of Formula Elements in a CSV File

This CVE was published Mar 04, 2020 and is one of 16 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Appointment Booking Calendar to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Appointment Booking Calendar plugin before 1.3.35 for WordPress allows user input (in fields such as Description or Name) in any booking form to be any formula, which then could be exported via the Bookings list tab in /wp-admin/admin.php?page=cpabc_appointments.php. The attacker could achieve remote code execution via CSV injection.

NVD vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Primary and upstream sources