Is CVE-2026-57812 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57812 being exploited in the wild.

How severe is CVE-2026-57812?

Medium severity, with a CVSS score of 6.5, published 13 July 2026.

Which products and versions are affected?

NSquared Simply Schedule Appointments <= 1.6.12.4.

Is there a fix for CVE-2026-57812?

A patch was published on 2026-07-13: Version 1.6.12.6 confirmed as patched version Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-57812 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-57812?

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.

CVE-2026-57812: NSquared Simply Schedule Appointments missing authorization

Q: Is there a fix for CVE-2026-57812?

A patch was published on 2026-07-13: Version 1.6.12.6 confirmed as patched version Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-57812 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-57812?

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.

CVE-2026-57812 · Severity: medium · CVSS 6.5 · Published 2026-07-13

Simply Schedule Appointments is a popular WordPress plugin used by businesses to manage customer bookings and scheduling. A security flaw in the plugin's access control settings allows unauthorized individuals to perform actions that should be restricted to administrators or specific staff members. This could lead to unauthorized changes to appointment settings or disruption of the scheduling service, potentially impacting business operations and customer trust.

Quick answers

Is CVE-2026-57812 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57812 being exploited in the wild.
How severe is CVE-2026-57812?: Medium severity, with a CVSS score of 6.5, published 13 July 2026.
Which products and versions are affected?: NSquared Simply Schedule Appointments <= 1.6.12.4.
Is there a fix for CVE-2026-57812?: A patch was published on 2026-07-13: Version 1.6.12.6 confirmed as patched version Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57812 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-57812?: 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 vulnerability is classified as Missing Authorization (CWE-862) within the Simply Schedule Appointments plugin. It stems from a failure to properly validate user permissions or security tokens (nonces) when processing certain requests, allowing an unauthenticated attacker to execute actions intended for higher-privileged users. The flaw specifically impacts versions up to and including 1.6.12.4. An attacker can leverage this to modify plugin configurations or disrupt service availability. The issue is resolved in version 1.6.12.6.

Affected products

NSquared Simply Schedule Appointments <= 1.6.12.4

Timeline

2026-06-11: disclosed: Reported by researcher hio to Patchstack
2026-07-09: advisory: Patchstack published advisory details
2026-07-13: advisory: CVE published to NVD dataset
2026-07-13: patched: Version 1.6.12.6 confirmed as patched version

References

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