CVE-2024-35283Network attack vector

Stored script execution via Legacy Chat input

Published May 29, 2024 · Updated Feb 13, 2025

Stored XSS in the Ignite component of Mitel MiContact Center Business 10.0.0.4 and earlier allows remote attackers to execute scripts. The Legacy Chat path in Ignite stores attacker-supplied input without sufficient validation, then renders it as active browser content. Legacy Chat must be enabled, no authentication is required to plant the payload, and a user must view the stored content for script execution.

CVSS severity9.3
Critical
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the Ignite component of Mitel MiContact Center Business 10.0.0.4 and earlier allows remote attackers to execute scripts. The Legacy Chat path in Ignite stores attacker-supplied input without sufficient validation, then renders it as active browser content. Legacy Chat must be enabled, no authentication is required to plant the payload, and a user must view the stored content for script execution.

The record

CVE
CVE-2024-35283
Published
May 29, 2024
Updated
Feb 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. Feb 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

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
9.3MitelCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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 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.

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Technologies

Your stack

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Your stack

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