CVE-2019-16385Public exploitNetwork attack vector

Reflected XSS via CRLF-injected MIME type

Published Jun 4, 2020 · Updated Aug 5, 2024

HTTP response splitting in Cybele Thinfinity VirtualUI 2.5.17.2 and earlier allows remote attackers to execute reflected JavaScript. The PDF viewer copies the mimetype URL parameter verbatim into the Content-Type header, so encoded CRLF characters split the response and place attacker-controlled HTML and JavaScript in its body. Execution requires a victim to load a crafted PDF-viewer request, exposing data or actions available to the application in that browser session.

CVSS severity6.1
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP response splitting in Cybele Thinfinity VirtualUI 2.5.17.2 and earlier allows remote attackers to execute reflected JavaScript. The PDF viewer copies the mimetype URL parameter verbatim into the Content-Type header, so encoded CRLF characters split the response and place attacker-controlled HTML and JavaScript in its body. Execution requires a victim to load a crafted PDF-viewer request, exposing data or actions available to the application in that browser session.

The record

CVE
CVE-2019-16385
Published
Jun 4, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CWE-74, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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?

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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1189Drive-by Compromise

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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