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Vulnerabilities

Vulnerability · CVE-2025-12166

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the and parameters in all versions up t

Published Jan 14, 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-2025-12166. EPSS is 0.34%. 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
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.34%
Remediation
Vendor / distro source
Affected products
vendor croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 ≤1.6.9.9

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the and parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

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 ≤1.6.9.90 ≤1.6.9.9

How to fix CVE-2025-12166

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-2025-12166. EPSS is 0.34%. 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 ≤1.6.9.9 0 ≤1.6.9.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.34%. 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 14, 2026 · EUVD

    Detected

    The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the and parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additiona

  2. Apr 8, 2026 · EUVD

    Updated

    The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the and parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additiona

Sources

  • CVE.orgVulnerability recordCVE-2025-12166

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12166

    30-day exploitation probability 0.34%

    first.org
  • EUVDVulnerability recordEUVD-2026-2839

    The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the and parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of su

    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