CVE-2026-16540 — HIGH (7.5)

Vulnerability Description

The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve the personal data of all appointments across the site and, on premium editions, to permanently delete them.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-863

References

https://wpscan.com/vulnerability/c3829294-c388-4151-9e25-a3eac7b1f1c6/

FAQ

What is CVE-2026-16540?

CVE-2026-16540 is a vulnerability with a CVSS score of 7.5 (HIGH). The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve th...

How severe is CVE-2026-16540?

CVE-2026-16540 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-16540?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.