CVE-2024-35284Network attack vector

Script execution via reflected Legacy Chat input

Published May 29, 2024 · Updated Mar 13, 2025

Reflected XSS in Mitel MiContact Center Business 10.0.0.4 and earlier allows remote attackers to execute scripts through Legacy Chat input. Mitel attributes the flaw to insufficient input validation but does not identify the request parameter being reflected or the output-encoding operation that fails. Exploitation requires a Legacy Chat deployment and user interaction, and the resulting script executes in the affected user's browser context.

CVSS severity5.4
Medium
EPSS probability0.25%
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 Mitel MiContact Center Business 10.0.0.4 and earlier allows remote attackers to execute scripts through Legacy Chat input. Mitel attributes the flaw to insufficient input validation but does not identify the request parameter being reflected or the output-encoding operation that fails. Exploitation requires a Legacy Chat deployment and user interaction, and the resulting script executes in the affected user's browser context.

The record

CVE
CVE-2024-35284
Published
May 29, 2024
Updated
Mar 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record 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

5.4CISA-ADPCVSS: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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