CVE-2024-4975Public exploitNetwork attack vector

Browser script execution via unsanitized chat messages

Published May 16, 2024 · Updated Aug 1, 2024

Cross-site scripting in Code Projects Simple Chat System 1.0 allows remote authenticated users to execute script through chat messages. The message handler inserts user-supplied message content into the chat page without adequate sanitization, causing an HTML event handler to execute in a participant's browser. An account and a viewed malicious message are required; successful exploitation runs script in the site's browser context and can expose session data.

CVSS severity5.3
Medium
EPSS probability0.48%
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 Code Projects Simple Chat System 1.0 allows remote authenticated users to execute script through chat messages. The message handler inserts user-supplied message content into the chat page without adequate sanitization, causing an HTML event handler to execute in a participant's browser. An account and a viewed malicious message are required; successful exploitation runs script in the site's browser context and can expose session data.

The record

CVE
CVE-2024-4975
Published
May 16, 2024
Updated
Aug 1, 2024
Vendor
Code Projects
Product
Simple Chat System in PHP
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Code Projects · Simple Chat System in PHPversion=1.0

Published CVSS scores

5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
6.1NISTCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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