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Vulnerabilities

Vulnerability · CVE-2025-11723

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and inclu

Published Jan 6, 2026 · catalog updated Apr 8, 2026 · Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-11723. EPSS is 0.22%. Act only if a listed version of Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Vendor / distro source
Affected products
vendor croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 ≤1.6.9.5

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 ≤1.6.9.50 ≤1.6.9.5

How to fix CVE-2025-11723

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-11723. EPSS is 0.22%. Act only if a listed version of Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin is installed.

Which versions are affected?

Compare what you have installed with croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 ≤1.6.9.5 0 ≤1.6.9.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 6, 2026 · EUVD

    Detected

    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

  2. Apr 8, 2026 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-11723

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-11723

    30-day exploitation probability 0.22%

    first.org
  • EUVDVulnerability recordEUVD-2026-1093

    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 possib

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgOct 30, 2026
  • EUVDOct 30, 2026