CVE-2024-0246Public exploitNetwork attack vector

Browser script execution via unsanitized lang parameter

Published Jan 5, 2024 · Updated Nov 14, 2024

Reflected XSS in IceWarp Server 12.0.2.1 and 12.0.3.1 allows remote attackers to execute script in a victim's browser via lang. The /install/ Utility Download Handler inserts the lang parameter into an HTML response without neutralizing script markup. No authentication is required, but a victim must open the crafted request; injected script runs in the page origin and can alter rendered content.

CVSS severity4.3
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in IceWarp Server 12.0.2.1 and 12.0.3.1 allows remote attackers to execute script in a victim's browser via lang. The /install/ Utility Download Handler inserts the lang parameter into an HTML response without neutralizing script markup. No authentication is required, but a victim must open the crafted request; injected script runs in the page origin and can alter rendered content.

The record

CVE
CVE-2024-0246
Published
Jan 5, 2024
Updated
Nov 14, 2024
Vendor
IceWarp
Product
IceWarp Server
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 14, 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=12.0.2.1
  2. Affected versionversion=12.0.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IceWarp · IceWarp Serverversion=12.0.2.1; version=12.0.3.1

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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
Privilegesunauthenticated
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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