CVE-2022-21142Network attack vector

IP-based login restriction bypass

Published Feb 24, 2022 · Updated Aug 3, 2024

Authentication bypass in Appleple a-blog cms allows remote attackers to bypass configured IP-based login restrictions. Appleple has not published how requests evade the IP address checks used by the Login Restriction, Permission Restriction, and Basic Authentication Skip features. Exposure requires at least one affected restriction feature to be enabled; username-and-password authentication itself remains intact.

CVSS severity9.8
Critical
EPSS probability1.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Appleple a-blog cms allows remote attackers to bypass configured IP-based login restrictions. Appleple has not published how requests evade the IP address checks used by the Login Restriction, Permission Restriction, and Basic Authentication Skip features. Exposure requires at least one affected restriction feature to be enabled; username-and-password authentication itself remains intact.

The record

CVE
CVE-2022-21142
Published
Feb 24, 2022
Updated
Aug 3, 2024
Vendor
Appleple
Product
a-blog cms
Classifications
CWE-291, CWE-290, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 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

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=Ver.2.8.x series versions prior to Ver.2.8.74, Ver.2.9.x series versions prior to Ver.2.9.39, Ver.2.10.x series versions prior to Ver.2.10.43, and Ver.2.11.x series versions prior to Ver.2.11.41

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Appleple · a-blog cmsversion=Ver.2.8.x series versions prior to Ver.2.8.74, Ver.2.9.x series versions prior to Ver.2.9.39, Ver.2.10.x series versions prior to Ver.2.10.43, and Ver.2.11.x series versions prior to Ver.2.11.41

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
6.8JPCERT/CC and IPAAV:N/AC:M/Au:N/C:P/I:P/A:P
5.6JPCERT/CC and IPACVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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-291Reliance on IP Address for Authentication
CWE-290Authentication Bypass by Spoofing
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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