a-blog cms: Authentication Bypass by Spoofing
CVE-2022-21142 is a critical-severity authentication bypass by spoofing vulnerability in a-blog cms from Appleple, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.55% chance of exploitation within 30 days, higher than 75% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of a-blog cms you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on developer.a-blogcms.jp for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Appleple | a-blog cms | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 2.0 | 6.8 | Medium | NVD |
Official description
Authentication bypass vulnerability in a-blog cms 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 allows a remote unauthenticated attacker to bypass authentication under the specific condition.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Spoofing
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
More Authentication Bypass by Spoofing vulnerabilities (CWE-290)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- jvn.jp/en/jp/JVN14706307/index.htmlThird Party Advisory
Other vulnerabilities in a-blog cms
- 9.8 Critical severity
- 7.5 High severity
- 7.2 High severity
- 7.5 High severity
- 8.1 High severity
- 8.8 High severity
Recent Authentication Bypass by Spoofing vulnerabilities
- 9.8 Critical severity
Apache APISIX Authentication Bypass Exploited
- 9.8 Critical severity
Zabbix Frontend Authentication Bypass Exploited
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