CVE-2021-45092Public exploitNetwork attack vector

Phishing via unrestricted iframe source

Published Dec 16, 2021 · Updated Aug 4, 2024

IFRAME injection in /lab.html in Cybele Software Thinfinity VirtualUI before 3.0 allows remote attackers to display external sites. The page assigns the vpath parameter's scheme-relative URL to an iframe source without restricting it to trusted content. The page is reachable by default without authentication, allowing a crafted VirtualUI URL to present attacker-chosen, frameable content for phishing.

CVSS severity9.8
Critical
EPSS probability39.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IFRAME injection in /lab.html in Cybele Software Thinfinity VirtualUI before 3.0 allows remote attackers to display external sites. The page assigns the vpath parameter's scheme-relative URL to an iframe source without restricting it to trusted content. The page is reachable by default without authentication, allowing a crafted VirtualUI URL to present attacker-chosen, frameable content for phishing.

The record

CVE
CVE-2021-45092
Published
Dec 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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

T1566.002Phishing: Spearphishing Link

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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