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CVE-2023-39737

22
FAUCET Score

CVE-2023-39737 is a client secret leakage vulnerability in Matsuya Line version 13.6.1, allowing attackers to gain unauthorized access to channel access tokens. This high-severity vulnerability (CVSS 8.2) is easily exploitable over the network without user interaction, potentially leading to high confidentiality impact through the sending of crafted broadcast messages and low integrity impact. While no active exploitation, public exploit code, or significant community discussion has been observed, the risk score indicates a notable concern.

Impacted Technologies

VendorProductVersion(s)CPE
13.6.1CPE matchmatch criteria
cpe:2.3:a:linecorp:matsuya:13.6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 22nd percentile among its peer group of 51,553 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-2023-39737.md
Exploit
liff.line.me / 1657535522-JD5Q5Yp1
Product