CVE-2023-3757Network attack vector

Browser script execution via unneutralized checkout fields

Published Jul 19, 2023 · Updated Nov 22, 2024

Cross-site scripting in GZ Scripts Car Rental Script 1.8 allows remote authenticated users to execute browser scripts through checkout fields. The EventBookingCalendar checkout endpoint fails to neutralize first_name, second_name, phone, address_1, and country values before generating page content. A victim must load the crafted output; the script can alter page content in that victim's browser, with no direct server availability impact.

CVSS severity6.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in GZ Scripts Car Rental Script 1.8 allows remote authenticated users to execute browser scripts through checkout fields. The EventBookingCalendar checkout endpoint fails to neutralize first_name, second_name, phone, address_1, and country values before generating page content. A victim must load the crafted output; the script can alter page content in that victim's browser, with no direct server availability impact.

The record

CVE
CVE-2023-3757
Published
Jul 19, 2023
Updated
Nov 22, 2024
Vendor
GZ Scripts
Product
Car Rental Script PHP
Classifications
CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 22, 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=1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GZ Scripts · Car Rental Script PHPversion=1.8

Published CVSS scores

6.1NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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