CVE-2026-39493 CRITICAL

CVE-2026-39493: WordPress Simply Schedule Appointments plugin <= 1.6.9.27 - SQL Injection vulnerability

Vendor Nsquared

Product Simply Schedule Appointments

Weakness CWE-89 · SQLi

Published June 15, 2026

Last update June 16, 2026

View on NVD All CVEs

CVSS base score

9.3/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity None

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated SQL Injection in Simply Schedule Appointments <= 1.6.9.27 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Simply Schedule Appointments versions up to 1.6.9.27 contain a SQL injection vulnerability that allows unauthenticated attackers to read sensitive data from the database. The vulnerability requires no user interaction and can be exploited over the network. An attacker can extract database contents including user information and configuration data.

What an attacker can do

03Attacker Capabilities

Read sensitive data from the site's database without authentication.

Potential impact on your site

04Site Impact

Attackers can extract user data, credentials, and other sensitive information stored in your database.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

June 16, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-39493 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/89.html AskarLabs — CWE-89 write-up SQL Injection

Related vulnerabilities

Identifiers

CVE CVE-2026-39493

CWE CWE-89

CVSS 9.3 / CRITICAL

Affected versions