Unauthorized Data Access in Simply Schedule Appointments for WordPress
CVE-2026-16540

7.5HIGH

Key Information:

Vendor

WordPress
Status
Simply Schedule Appointments
Vendor
CVE Published:
2 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16540?

The Simply Schedule Appointments plugin for WordPress prior to version 1.6.12.6 contains a vulnerability that fails to adequately restrict bulk operations to a requester's own records. This oversight allows unauthenticated individuals to access personal data related to all appointments on the site. Additionally, users of premium editions may exploit this vulnerability to permanently delete appointment records, leading to significant data exposure and loss.

Affected Version(s)

Simply Schedule Appointments 0 < 1.6.12.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-16540 - Proof of Concept

References

https://wpscan.com/vulnerability/c3829294-c388-4151-9e25-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Suleyman Huseynov
WPScan
.