CVE-2023-39731
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe leakage of the client secret in Kaibutsunosato v13.6.1 allows attackers to obtain the channel access token and send crafted broadcast messages.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThe client secret was leaked in Kaibutsunosato v13.6.1, allowing attackers to obtain channel access tokens and send crafted broadcast messages. This is an information disclosure vulnerability that enables authentication token theft and abuse of the messaging/notification channel.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 13.6.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Kaibutsunosato versionCheck the installed version of Line Kaibutsunosato by reviewing application metadata, package files, or the software itselfAffected if The installed version is exactly 13.6.1
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Locate client secret configurationSearch configuration files, environment settings, or application properties where client secrets for Line Kaibutsunosato are storedAffected if A client secret is found stored in plaintext configuration, hardcoded in source code, or in accessible configuration files
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Review secret exposure sourcesInspect logs, debug output, error messages, and any files where the client secret might have been inadvertently written or exposedAffected if The client secret appears in logs, debug output, or other files where it should not be present
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Check for unauthorized channel access tokensAudit access logs or token management systems for any channel access tokens that may have been issued using the leaked client secretAffected if New or unexpected channel access tokens exist that were obtained after the version 13.6.1 deployment
A user is affected if Line Kaibutsunosato version 13.6.1 is deployed and the client secret has been exposed or used to obtain unauthorized channel access tokens.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImmediately rotate the leaked client secret, investigate and remediate the secret exposure source, and implement proper secrets management (environment variables, secret stores) to prevent future leaks.
- Consultation3.0 h
- Implementation6.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,744.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39731 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-39731 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data