CVE-2023-43683

MEDIUM
Published Aug 14, 2025 Modified Apr 15, 2026 CWE-121 CWE-125

Description

An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). A Stack buffer out-of-bounds access exists because of an integer underflow when handling newline characters.

Is your site exposed to CVE-2023-43683?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness Type (CWE)

CWE-121 CWE-121
CWE-125 Out-of-bounds Read

References

Frequently Asked Questions

What is CVE-2023-43683? +
An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). A Stack buffer out-of-bounds access exists because of an integer underflow when handling newline characters. It has a CVSS v3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2023-43683? +
CVE-2023-43683 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
How do I check if I'm vulnerable to CVE-2023-43683? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2023-43683 — free, no signup required.