CVE-2022-42975Network attack vector

Unauthorized channel connections via suffix-only origin matching

Published Oct 17, 2022 · Updated May 10, 2025

Origin validation error in Phoenix before 1.6.14 allows remote attackers to open unauthorized channel connections from malicious origins. Phoenix.Socket.Transport compare_host? accepts any hostname ending in the allowed suffix without requiring a subdomain-label boundary. Only wildcard check_origin configurations are exposed; default LiveView CSRF protection and token-authenticated channels block unauthenticated connections.

CVSS severity7.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Phoenix before 1.6.14 allows remote attackers to open unauthorized channel connections from malicious origins. Phoenix.Socket.Transport compare_host? accepts any hostname ending in the allowed suffix without requiring a subdomain-label boundary. Only wildcard check_origin configurations are exposed; default LiveView CSRF protection and token-authenticated channels block unauthenticated connections.

The record

CVE
CVE-2022-42975
Published
Oct 17, 2022
Updated
May 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, CWE-346, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 17, 2022CVE publishedPublication date reported by the CVE source.
  2. May 10, 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?

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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-863Incorrect Authorization
CWE-346Origin Validation Error
T1190Exploit Public-Facing Application

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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