Medium severity · published Jan 6, 2026
CVE-2025-11723
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.5 - Unauthenticated Sensitive Information Exposure
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.5 via the hash() function due to use of a hardcoded fall-back salt. This makes it possible for unauthenticated attackers to generate a valid token across sites running the plugin that have not manually set a salt in the wp-config.php file and access booking information that will allow them to make modifications.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AB
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin · croixhaug
through 1.6.9.5 · source: vendor
Affected product
AB
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
croixhaug
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11723
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11723
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3393919/
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a5f3fbd2-6152-4a89-8fe9-982120d1a640?source=cve
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