CVE-2023-5554

Name: CVE-2023-5554
Creator: NVD / NIST
Published: 2023-10-12T10:15:13.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2023-5554 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Lack of TLS certificate verification in log transmission of a financial module within LINE client for iOS prior to 13.16.0.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

Lack of TLS certificate verification in log transmission of a financial module within LINE client for iOS prior to 13.16.0.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.22%

12.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Linecorp	Line	< 13.16.0

References

https://hackerone.com/reports/2106827Permissions Required
https://hackerone.com/reports/2106827Permissions Required

Timeline

Published: Oct 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5554?

Lack of TLS certificate verification in log transmission of a financial module within LINE client for iOS prior to 13.16.0.

How severe is CVE-2023-5554?

CVE-2023-5554 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5554?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5554?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST