CVE-2021-24429Public exploitNetwork attack vector

Stored XSS via unsanitized booking names

Published Jul 12, 2021 · Updated Aug 3, 2024

Stored XSS in Salon Booking System before 6.3.1 allows remote attackers to execute JavaScript in an administrator's browser. The booking workflow stores the First Name value without properly sanitizing or escaping it before the Calendar page renders the appointment. Guest booking access is sufficient; execution occurs when an administrator opens the affected appointment in the Calendar page, enabling actions in that administrator's browser context.

CVSS severity6.1
Medium
EPSS probability1.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Salon Booking System before 6.3.1 allows remote attackers to execute JavaScript in an administrator's browser. The booking workflow stores the First Name value without properly sanitizing or escaping it before the Calendar page renders the appointment. Guest booking access is sufficient; execution occurs when an administrator opens the affected appointment in the Calendar page, enabling actions in that administrator's browser context.

The record

CVE
CVE-2021-24429
Published
Jul 12, 2021
Updated
Aug 3, 2024
Vendor
Salonbookingsystem OÜ
Product
Salon Booking System
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=6.3.1 <6.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Salonbookingsystem OÜ · Salon Booking Systemversion=6.3.1 <6.3.1

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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