# CVE-2026-39493: NSquared Simply Schedule Appointments SQL injection

Source: https://junglewise.ai/threats/cve-2026-39493-nsquared-simply-schedule-appointments-sql-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-39493 · Severity: critical · CVSS 9.3 · Published 2026-06-15

Simply Schedule Appointments is a WordPress plugin used by businesses to manage client bookings and appointments. A security flaw allows unauthorized individuals to interact directly with the website's database without needing a password. This could lead to the theft of sensitive customer information, appointment records, or other private data stored on the site.

## Quick answers

**Is CVE-2026-39493 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39493 being exploited in the wild.

**How severe is CVE-2026-39493?** Critical severity, with a CVSS score of 9.3, published 15 June 2026.

**Which products and versions are affected?** NSquared Simply Schedule Appointments <= 1.6.9.27.

**Is there a fix for CVE-2026-39493?** A patch was published on 2026-04-08: Version 1.6.9.29 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39493 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-39493?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Simply Schedule Appointments plugin for WordPress is vulnerable to an unauthenticated SQL injection due to improper neutralization of special elements used in an SQL command (CWE-89). The vulnerability exists in versions up to and including 1.6.9.27. A remote, unauthenticated attacker can exploit this flaw via a network request to execute arbitrary SQL queries. This allows for the unauthorized retrieval of sensitive data from the database. The issue has been addressed in version 1.6.9.29.

## Affected products

- NSquared Simply Schedule Appointments <= 1.6.9.27

## Timeline

- 2026-01-25: other: Reported by researcher Doan Dinh Van
- 2026-04-08: advisory: Patchstack published advisory
- 2026-06-15: disclosed: CVE published to NVD
- 2026-04-08: patched: Version 1.6.9.29 released

## References

- [https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-9-27-sql-injection-vulnerability-2?_s_id=cve](https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-9-27-sql-injection-vulnerability-2?_s_id=cve)