CVE-2024-42939Public exploitNetwork attack vector

Browser script execution via unescaped remarks text

Published Aug 21, 2024 · Updated Aug 21, 2024

Stored cross-site scripting in /index/index.html in YznCMS 1.4.2 allows remote authenticated users to execute scripts in a viewer's browser. The configured remarks text field stores attacker-controlled markup that /index/index.html renders without output neutralization. Low-privileged access is required to set the remarks value, and a user must view the affected page; resulting script execution can read or alter browser-accessible data.

CVSS severity5.4
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in /index/index.html in YznCMS 1.4.2 allows remote authenticated users to execute scripts in a viewer's browser. The configured remarks text field stores attacker-controlled markup that /index/index.html renders without output neutralization. Low-privileged access is required to set the remarks value, and a user must view the affected page; resulting script execution can read or alter browser-accessible data.

The record

CVE
CVE-2024-42939
Published
Aug 21, 2024
Updated
Aug 21, 2024
Vendor
YznCMS
Product
YznCMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=1.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

YznCMS · YznCMSversion=1.4.2

Published CVSS scores

4.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/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

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')
T1203Exploitation for Client Execution

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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