CVE-2019-9508Network attack vector

Browser script execution via unsanitized filenames

Published Mar 30, 2020 · Updated Sep 17, 2024

Stored XSS in the Vertiv Avocent UMG 4000 4.2.1.19 web interface allows remote authenticated users to execute script in a user's browser. The interface stores an administrator-supplied filename without sanitizing it and renders the name as active content whenever a user opens the affected page. Administrator privileges are required to plant the filename; browsing the page triggers the script, which can collect and exfiltrate sensitive information.

CVSS severity3.5
Low
EPSS probability0.63%
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 Vertiv Avocent UMG 4000 4.2.1.19 web interface allows remote authenticated users to execute script in a user's browser. The interface stores an administrator-supplied filename without sanitizing it and renders the name as active content whenever a user opens the affected page. Administrator privileges are required to plant the filename; browsing the page triggers the script, which can collect and exfiltrate sensitive information.

The record

CVE
CVE-2019-9508
Published
Mar 30, 2020
Updated
Sep 17, 2024
Vendor
Vertiv
Product
Avocent UMG 4000
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 30, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=4.2.1.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Vertiv · Avocent UMG 4000version=4.2.1.19

Published CVSS scores

6.3CERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
3.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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