CVE-2022-25227Public exploitNetwork attack vector

Remote command execution via exposed WebSocket session ID

Published May 20, 2022 · Updated Aug 3, 2024

CORS in Cybele Software Thinfinity VNC 4.0.0.1 allows remote attackers to execute commands through a victim's active browser session. The connect endpoint accepts a credentialed cross-origin request and returns an ID that authorizes a WebSocket controlling keyboard and mouse input. Exploitation requires the victim to visit attacker-controlled content while signed in, after which the hijacked session can run commands on the Windows host.

CVSS severity8.8
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS in Cybele Software Thinfinity VNC 4.0.0.1 allows remote attackers to execute commands through a victim's active browser session. The connect endpoint accepts a credentialed cross-origin request and returns an ID that authorizes a WebSocket controlling keyboard and mouse input. Exploitation requires the victim to visit attacker-controlled content while signed in, after which the hijacked session can run commands on the Windows host.

The record

CVE
CVE-2022-25227
Published
May 20, 2022
Updated
Aug 3, 2024
Vendor
Cybele Software
Product
Thinfinity VNC
Classifications
CWE-346, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=4.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cybele Software · Thinfinity VNCversion=4.0.0.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.3Fluid AttacksCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

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-346Origin Validation Error
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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