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:*:*:*:*:*:*:*

More vulnerabilities in Linecorp Line

CVE-2023-45559 — High (CVSS 8.2): An issue in Tamaki_hamanoki Line v.13.6.1 allows attackers to send crafted notifications via leakage of the channel…
CVE-2023-43305 — High (CVSS 8.2): An issue in studio kent mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage…
CVE-2023-43304 — High (CVSS 8.2): An issue in PARK DANDAN mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage…
CVE-2023-43303 — High (CVSS 8.2): An issue in craftbeer bar canvas mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via…
CVE-2023-43302 — High (CVSS 8.2): An issue in sanTas mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage of the…
CVE-2023-43301 — High (CVSS 8.2): An issue in DARTS SHOP MAXIM mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via…

All CVEs affecting Linecorp Line →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →