CVE-2025-6235Network attack vector

Browser script execution via unneutralized HTML attributes

Published Jul 21, 2025 · Updated Jul 21, 2025

Cross-site scripting in the ExtremeControl login interface before 25.5.12 allows remote attackers to run script in a user's browser. The interface places user-supplied input into HTML attributes without adequate neutralization, allowing an injected onmouseover handler to execute. Execution requires interaction with the crafted page element and can expose browser-accessible data or perform unauthorized actions in that browser context.

CVSS severity5.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in the ExtremeControl login interface before 25.5.12 allows remote attackers to run script in a user's browser. The interface places user-supplied input into HTML attributes without adequate neutralization, allowing an injected onmouseover handler to execute. Execution requires interaction with the crafted page element and can expose browser-accessible data or perform unauthorized actions in that browser context.

The record

CVE
CVE-2025-6235
Published
Jul 21, 2025
Updated
Jul 21, 2025
Vendor
Extreme Networks
Product
ExtremeControl
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=25.2.12 <25.5.11 changes=[{"at":"25.5.12","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Extreme Networks · ExtremeControlversion=25.2.12 <25.5.11 changes=[{"at":"25.5.12","status":"unaffected"}]

Published CVSS scores

5.3Extreme NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L
6.1NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

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

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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