CVE-2023-43305Network attack vector

Unauthorized notifications via leaked channel token

Published Dec 8, 2023 · Updated Aug 2, 2024

Channel token exposure in the studio kent mini-app on LINE 13.6.1 allows remote attackers to send crafted malicious notifications. The public CVE record identifies the mini-app's channel access token as the exposed secret but does not disclose the code path or operation that leaks it. No privileges or user interaction are required, and possession of the token permits unauthorized notification delivery without reported service interruption.

CVSS severity8.2
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Channel token exposure in the studio kent mini-app on LINE 13.6.1 allows remote attackers to send crafted malicious notifications. The public CVE record identifies the mini-app's channel access token as the exposed secret but does not disclose the code path or operation that leaks it. No privileges or user interaction are required, and possession of the token permits unauthorized notification delivery without reported service interruption.

The record

CVE
CVE-2023-43305
Published
Dec 8, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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