CVE-2022-23655Network attack vector

Private-key exfiltration via unchecked gateway signatures

Published Feb 23, 2022 · Updated Apr 23, 2025

Improper verification of cryptographic signatures in October CMS before 1.0.475 or 1.1.11 allows remote authenticated users to exfiltrate private keys. Gateway responses are accepted without validating the server signature, so a non-authoritative gateway can supply responses that cause key material to be sent out. Exploitation requires an authenticated installation workflow that reaches the gateway and user interaction; impact is confidentiality loss without reported integrity or availability effects.

CVSS severity4.8
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper verification of cryptographic signatures in October CMS before 1.0.475 or 1.1.11 allows remote authenticated users to exfiltrate private keys. Gateway responses are accepted without validating the server signature, so a non-authoritative gateway can supply responses that cause key material to be sent out. Exploitation requires an authenticated installation workflow that reaches the gateway and user interaction; impact is confidentiality loss without reported integrity or availability effects.

The record

CVE
CVE-2022-23655
Published
Feb 23, 2022
Updated
Apr 23, 2025
Vendor
October CMS
Product
October CMS
Classifications
CWE-347, T1552.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.475
  2. Affected versionversion=>= 1.1.0, < 1.1.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

October CMS · October CMSversion=< 1.0.475; version=>= 1.1.0, < 1.1.11

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1552.004Unsecured Credentials: Private Keys

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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