CVE-2023-37728Public exploitNetwork attack vector

Script execution via unencoded color parameter

Published Jul 20, 2023 · Updated Jul 9, 2026

Reflected cross-site scripting in IceWarp Server 10.2.1 allows remote attackers to execute script in a user's browser via the color parameter. The webmail response reflects the color parameter into HTML without adequate output encoding, allowing crafted markup to execute as script. Exploitation requires a user to open a crafted request; successful script runs in that user's IceWarp web origin and can read or alter session-accessible data.

CVSS severity6.1
Medium
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected cross-site scripting in IceWarp Server 10.2.1 allows remote attackers to execute script in a user's browser via the color parameter. The webmail response reflects the color parameter into HTML without adequate output encoding, allowing crafted markup to execute as script. Exploitation requires a user to open a crafted request; successful script runs in that user's IceWarp web origin and can read or alter session-accessible data.

The record

CVE
CVE-2023-37728
Published
Jul 20, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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