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CVE-2023-39731

16
FAUCET Score

CVE-2023-39731 describes a client secret leakage vulnerability in Kaibutsunosato v13.6.1, allowing attackers to gain unauthorized access to channel access tokens. This medium-severity vulnerability, rated CVSS 5.3, has a low impact on confidentiality but does not affect integrity or availability, as attackers can send crafted broadcast messages. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
13.6.1CPE matchmatch criteria
cpe:2.3:a:line:kaibutsunosato:13.6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 17th percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

github.com / syz913/CVE-reports/blob/main/CVE-2023-39731.md
Third Party Advisory
liff.line.me / 1657662489-pwEQNzJ4
Vendor Advisory