CVE-2022-4722Public exploitNetwork attack vector

Unauthorized account access via case-variant duplicate usernames

Published Dec 23, 2022 · Updated Apr 9, 2025

Authentication bypass in IKUS Software Rdiffweb before 2.5.5 allows remote authenticated users to access another user's account. The login path performs an exact-case username lookup while account creation permits case variants, allowing duplicate identities to collide. Exploitation requires privileged account-creation access and a case-variant duplicate, after which the targeted account's backup data and controls become accessible.

CVSS severity7.2
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in IKUS Software Rdiffweb before 2.5.5 allows remote authenticated users to access another user's account. The login path performs an exact-case username lookup while account creation permits case variants, allowing duplicate identities to collide. Exploitation requires privileged account-creation access and a case-variant duplicate, after which the targeted account's backup data and controls become accessible.

The record

CVE
CVE-2022-4722
Published
Dec 23, 2022
Updated
Apr 9, 2025
Vendor
IKUS Software
Product
Rdiffweb
Classifications
CWE-305, CWE-287, T1078
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <2.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

IKUS Software · Rdiffwebversion=unspecified <2.5.5

Published CVSS scores

7.2huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo