CVE-2026-66453Network attack vector

Authentication bypass via Facebook login flow

Published Aug 13, 2026 · Updated Aug 13, 2026

Authentication bypass in Salon Booking System 10.30.26 and earlier allows remote attackers to obtain a WordPress authentication cookie. The Facebook login handler passes a user ID returned by SLN_Helper_FacebookLogin::getUserIDByAccessToken() to wp_set_auth_cookie() without first confirming that the user exists. No account or user interaction is required, but the exact access-token condition and reachable account privileges have not been disclosed.

CVSS severity9.8
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Salon Booking System 10.30.26 and earlier allows remote attackers to obtain a WordPress authentication cookie. The Facebook login handler passes a user ID returned by SLN_Helper_FacebookLogin::getUserIDByAccessToken() to wp_set_auth_cookie() without first confirming that the user exists. No account or user interaction is required, but the exact access-token condition and reachable account privileges have not been disclosed.

The record

CVE
CVE-2026-66453
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Salonbookingsystem OÜ
Product
Salon Booking System
Classifications
CWE-288, CAPEC-50, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=n/a <=10.30.26 changes=[{"at":"10.30.27","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Salonbookingsystem OÜ · Salon Booking Systemversion=n/a <=10.30.26 changes=[{"at":"10.30.27","status":"unaffected"}]

Published CVSS scores

9.8PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
CAPEC-50Password Recovery Exploitation
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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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