CVE-2021-42643

Name: CVE-2021-42643
Creator: NVD / NIST
Published: 2022-05-17T12:15:07.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.56%

Last modified Jun 17, 2026

CVE-2021-42643 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. cmseasy V7.7.5_20211012 is affected by an arbitrary file write vulnerability. Through this vulnerability, a PHP script file is written to the website server, and accessing this file can lead to a code execution vulnerability.. EPSS estimates a 1.56% chance of exploitation in the next 30 days.

Description

cmseasy V7.7.5_20211012 is affected by an arbitrary file write vulnerability. Through this vulnerability, a PHP script file is written to the website server, and accessing this file can lead to a code execution vulnerability.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.56%

72.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Cmseasy	Cmseasy	7.7.5_20211012

References

Timeline

Published: May 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42643?

How severe is CVE-2021-42643?

CVE-2021-42643 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.56% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42643?

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-2021-42643?

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

Scan your code now

Source: NVD / NIST