CVE-2026-17021Public exploitNetwork attack vector

Unauthenticated booking-total tampering via unchecked booking IDs

Published Aug 10, 2026 · Updated Aug 10, 2026

Missing authorization in Salon Booking System before 10.30.34 allows remote attackers to overwrite arbitrary booking totals through AJAX requests. The applyTipsAmount and ApplyDiscountCode handlers accept an attacker-selected sln_booking_id without a cookie, nonce, or ownership check, then persist a recalculated total. Any reachable site with an existing booking is exposed; the default-enabled discount module permits reducing a booking total to zero, while the tips path can inflate it.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Salon Booking System before 10.30.34 allows remote attackers to overwrite arbitrary booking totals through AJAX requests. The applyTipsAmount and ApplyDiscountCode handlers accept an attacker-selected sln_booking_id without a cookie, nonce, or ownership check, then persist a recalculated total. Any reachable site with an existing booking is exposed; the default-enabled discount module permits reducing a booking total to zero, while the tips path can inflate it.

The record

CVE
CVE-2026-17021
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
Salonbookingsystem OÜ
Product
Salon Booking System
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=10.30.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Salonbookingsystem OÜ · Salon Booking Systemversion=0 <=10.30.33

Published CVSS scores

5.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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