CVE-2022-4018Network attack vector

Authentication bypass via undisclosed critical-function check

Published Nov 16, 2022 · Updated Apr 14, 2025

Missing authentication in IKUS Software Rdiffweb before 2.5.0a6 allows attackers to bypass a critical authentication check. Public sources do not disclose which critical function or code path omits the check; the referenced patch instead adds idle and absolute session timeouts. Published assessments conflict on attacker location, privileges, and impact, although both require user interaction, so the dependable exploitation boundary remains undisclosed.

CVSS severity6.1
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in IKUS Software Rdiffweb before 2.5.0a6 allows attackers to bypass a critical authentication check. Public sources do not disclose which critical function or code path omits the check; the referenced patch instead adds idle and absolute session timeouts. Published assessments conflict on attacker location, privileges, and impact, although both require user interaction, so the dependable exploitation boundary remains undisclosed.

The record

CVE
CVE-2022-4018
Published
Nov 16, 2022
Updated
Apr 14, 2025
Vendor
IKUS Software
Product
Rdiffweb
Classifications
CWE-306
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=unspecified <2.5.0a6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IKUS Software · Rdiffwebversion=unspecified <2.5.0a6

Published CVSS scores

6.1huntr.devCVSS:3.0/AV:P/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
2.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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-306Missing Authentication for Critical Function

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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