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Medium severity · published Sep 22, 2026
CVE-2026-93655
Booking Calendar <= 11.8.3 - Reflected Cross-Site Scripting via 'wpbc_auto_fill' Parameter
6.1
CVSS
0.4%
EPSS
No
On KEV
Description
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BC
Booking Calendar · wpdevelop
through 11.8.3 · source: vendor
Affected product
BC
Booking Calendar
wpdevelop
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93655
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93655
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/_dist/all/_src/wpbc_all.js#L3370
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/_dist/all/_src/wpbc_all.js#L3396
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/js/wpbc_time-selector.js#L87
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?reponame=&old=3703002%40booking&new=3703002%40booking
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/37fdbbc3-6151-4962-90fa-a621d01a5eb2?source=cve
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