Is CVE-2026-17021 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-17021 being exploited in the wild.

How severe is CVE-2026-17021?

Medium severity, with a CVSS score of 5.3, published 10 August 2026.

Which products and versions are affected?

Salon Booking System before 10.30.34.

Is there a fix for CVE-2026-17021?

A patch was published on 2026-08-10: Fixed in version 10.30.34 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-17021 attacked?

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

Am I affected by CVE-2026-17021?

Check whether you run Salon Booking System 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.

CVE-2026-17021: Salon Booking System missing authorization in booking AJAX actions

CVE-2026-17021 · Severity: medium · CVSS 5.3 · Published 2026-08-10

The Salon Booking System WordPress plugin allows unauthenticated attackers to modify booking totals through unprotected booking-modification features. An attacker can inflate or corrupt the recorded cost of any booking by directly calling WordPress AJAX endpoints, enabling them to steal revenue, apply unauthorized discounts, or create financial discrepancies in the business records.

Technologies: Salon Booking System. Vendors: Salon Booking System.

Quick answers

Is CVE-2026-17021 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-17021 being exploited in the wild.
How severe is CVE-2026-17021?: Medium severity, with a CVSS score of 5.3, published 10 August 2026.
Which products and versions are affected?: Salon Booking System before 10.30.34.
Is there a fix for CVE-2026-17021?: A patch was published on 2026-08-10: Fixed in version 10.30.34 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-17021 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-17021?: Check whether you run Salon Booking System 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.

Technical details

The vulnerability is a broken access control (CWE-862) in the plugin's AJAX handlers for booking modifications. The applyTipsAmount and ApplyDiscountCode actions fail to verify user authentication and do not check booking ownership, accepting any attacker-supplied booking ID without authorization checks or CSRF tokens. An unauthenticated attacker can POST directly to wp-admin/admin-ajax.php with parameters like action=salon&method=applyTipsAmount&sln_booking_id=[target]&sln[tips]=[amount] to manipulate stored booking totals. The vulnerability affects versions before 10.30.34; it was patched in 10.30.34. Both the tips handler and discount handler (when the discount system is enabled, which is the default) are exploitable with no authentication, cookie, or nonce required.

Affected products

Salon Booking System Salon Booking System before 10.30.34

Timeline

2026-08-06: disclosed
2026-08-10: patched: Fixed in version 10.30.34
2026-08-10: advisory

References

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