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CVE-2022-21142

29
FAUCET Score

CVE-2022-21142 is a critical authentication bypass vulnerability affecting specific versions of a-blog cms (Ver.2.8.x, Ver.2.9.x, Ver.2.10.x, and Ver.2.11.x series). This flaw allows a remote, unauthenticated attacker to bypass authentication under specific conditions, potentially leading to full compromise of the system. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed on the CISA KEV catalog, indicating no active exploitation. Community discussion and media coverage are also minimal.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.8.0, < 2.8.74CPE matchmatch criteria
cpe:2.3:a:appleple:a-blog_cms:*:*:*:*:*:*:*:*
>= 2.9.0, < 2.9.39CPE matchmatch criteria
cpe:2.3:a:appleple:a-blog_cms:*:*:*:*:*:*:*:*
>= 2.10.0, < 2.10.43CPE matchmatch criteria
cpe:2.3:a:appleple:a-blog_cms:*:*:*:*:*:*:*:*
>= 2.11.0, < 2.11.41CPE matchmatch criteria
cpe:2.3:a:appleple:a-blog_cms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 60th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

developer.a-blogcms.jp / blog/news/security-202202.html
Vendor Advisory
jvn.jp / en/jp/JVN14706307/index.html
Third Party Advisory