CVE-2026-65508 CRITICAL

CVE-2026-65508: WordPress Simply Schedule Appointments plugin <= 1.6.12.10 - SQL Injection vulnerability

Vendor Nsquared

Product Simply Schedule Appointments

Weakness CWE-89 · SQLi

Published August 6, 2026

Last update August 6, 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 <= 1.6.12.10 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Simply Schedule Appointments versions up to 1.6.12.10 contain a SQL injection vulnerability that allows unauthenticated attackers to query the database directly over the network. An attacker can extract sensitive data including user credentials and appointment information. The vulnerability also causes partial service disruption. No user interaction is required to exploit this flaw.

What an attacker can do

03Attacker Capabilities

Extract sensitive data from the database, including user credentials and appointment records, without authentication.

Potential impact on your site

04Site Impact

User data and credentials may be compromised; attackers can read appointment details and cause partial service outages.

Conditions required to exploit

05Prerequisites

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

Key dates

06Disclosure timeline

August 6, 2026 CVE published

August 6, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-65508 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/89.html AskarLabs — CWE-89 write-up SQL Injection

Related vulnerabilities

Identifiers

CVE CVE-2026-65508

CWE CWE-89

CVSS 9.3 / CRITICAL

Affected versions