CVE-2023-3558Network attack vector

Script execution via unescaped load.php parameters

Published Jul 8, 2023 · Updated Aug 2, 2024

Cross-site scripting in GZ Scripts Event Booking Calendar 1.8 allows remote authenticated users to execute script in a user's browser. An unknown function in /load.php places the first_name, second_name, phone, address_1, or country parameter into a generated page without neutralization. Low-privileged access and user interaction are required; successful exploitation alters content in the affected page's browser context.

CVSS severity5.4
Medium
EPSS probability0.51%
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 Event Booking Calendar 1.8 allows remote authenticated users to execute script in a user's browser. An unknown function in /load.php places the first_name, second_name, phone, address_1, or country parameter into a generated page without neutralization. Low-privileged access and user interaction are required; successful exploitation alters content in the affected page's browser context.

The record

CVE
CVE-2023-3558
Published
Jul 8, 2023
Updated
Aug 2, 2024
Vendor
GZ Scripts
Product
Event Booking Calendar
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 · Event Booking Calendarversion=1.8

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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