How severe is CVE-2023-43999?

CVE-2023-43999 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-43999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43999?

CVE-2023-43999 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43999?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-43999 have an EU (EUVD) identifier?

Yes. CVE-2023-43999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48358.

When was CVE-2023-43999 published?

CVE-2023-43999 was published on 2024-01-24 and last updated on 2026-06-17.

CVE-2023-43999

CVE-2023-43999 is a medium-severity vulnerability in Linecorp Line with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-48358
Weakness: CWE-79
Affected product: Linecorp Line
Published: 2024-01-24
Last modified: 2026-06-17

Description

An issue in COLORFUL_laundry mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage of the channel access token.

Frequently asked questions

What is CVE-2023-43999?: An issue in COLORFUL_laundry mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage of the channel access token.
How severe is CVE-2023-43999?: CVE-2023-43999 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-43999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43999?: CVE-2023-43999 affects Linecorp Line. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-43999 have an EU (EUVD) identifier?: Yes. CVE-2023-43999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48358.
When was CVE-2023-43999 published?: CVE-2023-43999 was published on 2024-01-24 and last updated on 2026-06-17.

References

https://github.com/syz913/CVE-reports/blob/main/CVE-2023-43999.md

Affected products (1)

cpe:2.3:a:linecorp:line:13.6.1:*:*:*:*:*:*:*

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