# CVE-2026-110382: NSquared Simply Schedule Appointments stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-110382-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-18. Updated: 2026-10-18  
License: CC BY 4.0 with a link back

CVE-2026-110382 · Severity: high · CVSS 7.1 · Published 2026-10-18

Simply Schedule Appointments is a WordPress plugin that manages appointment scheduling for businesses. A stored cross-site scripting (XSS) vulnerability allows unauthenticated attackers to inject malicious scripts into the site, which could steal visitor data or hijack user accounts when those visitors view affected pages. The vulnerability affects versions up to 1.6.12.35.

Technologies: [NSquared Simply Schedule Appointments](https://junglewise.ai/threats/technologies/nsquared-simply-schedule-appointments). Vendors: [NSquared](https://junglewise.ai/threats/vendors/nsquared).

## Quick answers

**Is CVE-2026-110382 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-110382 being exploited in the wild.

**How severe is CVE-2026-110382?** High severity, with a CVSS score of 7.1, published 18 October 2026.

**Which products and versions are affected?** NSquared Simply Schedule Appointments up to 1.6.12.35.

**Is there a fix for CVE-2026-110382?** Yes: fixed in 1.6.12.37. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-110382 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-110382?** Check whether you run NSquared Simply Schedule Appointments at an affected version. 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.

## How to fix

- Fixed in 1.6.12.37

## Technical details

The plugin fails to properly neutralize user input during web page generation, allowing stored XSS injection. While the vulnerability can be initiated by an unauthenticated attacker, successful exploitation requires user interaction such as clicking a malicious link or visiting a crafted page. Attackers can inject persistent malicious scripts that execute in the browsers of site visitors, potentially leading to credential theft or session hijacking.

## Affected products

- NSquared Simply Schedule Appointments up to 1.6.12.35

## Timeline

- 2026-10-18: disclosed
- 2026-10-16: other: Patchstack published vulnerability details

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-12-35-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-12-35-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [NSquared Simply Schedule Appointments broken access control](https://junglewise.ai/threats/cve-2026-125437-missing-authorization-vulnerability-in-nsquared-simply-schedule)
- [NSquared Simply Schedule Appointments IDOR vulnerability](https://junglewise.ai/threats/cve-2026-110381-authorization-bypass-through-user-controlled-key-vulnerability)
- [Simply Schedule Appointments IDOR vulnerability](https://junglewise.ai/threats/cve-2026-94673-unauthenticated-insecure-direct-object-references-idor-in-simply)
- [Simply Schedule Appointments broken access control](https://junglewise.ai/threats/cve-2026-94074-unauthenticated-broken-access-control-in-simply-schedule)