Critical severity · published Oct 6, 2026
CVE-2026-39764
WordPress Radius Booking — Booking Calendar for Appointments & Services plugin <= 1.0.19 - SQL Injection vulnerability
9.3
CVSS
0.3%
EPSS
No
On KEV
Description
Unauthenticated SQL Injection in Radius Booking — Booking Calendar for Appointments & Services <= 1.0.19 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RB
Radius Booking — Booking Calendar for Appointments & Services · RadiusTheme
through 1.0.19 · source: vendor
Affected product
RB
Radius Booking — Booking Calendar for Appointments & Services
RadiusTheme
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39764
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39764
vdb-entry
https://patchstack.com/database/wordpress/plugin/radius-booking/vulnerability/wordpress-radius-booking-booking-calendar-for-appointments-services-plugin-1-0-19-sql-injection-vulnerability?_s_id=cve