Medium severity · published Jan 3, 2022
CVE-2021-25040
Booking Calendar < 8.9.2 - Reflected Cross-Site Scripting
6.1
CVSS
0.8%
EPSS
No
On KEV
Description
The Booking Calendar WordPress plugin before 8.9.2 does not sanitise and escape the booking_type parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BC
Booking Calendar ·
8.9.2 before 8.9.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-25040
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-25040
Exploit
https://wpscan.com/vulnerability/3ed821a6-c3e2-4964-86f8-d14c4a54708a
More from Booking Calendar
6.1
CVE-2023-4620
Booking Calendar < 9.7.3.1 - Unauthenticated Stored XSS
4.8
CVE-2026-105193
Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification via Predictable Booking Hash
2.7
CVE-2026-105195
Booking Calendar 10.15 - 11.8.2 - Editor+ Arbitrary Option Disclosure