CVE-2021-42645

Public Exploit

Description

CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. To exploit this vulnerability, an attacker must use the "File" parameter to upload a PHP payload to get a reverse shell from the vulnerable host.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 12.13% Top 10%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/Net-hunter121/CMSimple_XH-Unauth-RCE third party advisory exploit
https://github.com/cmsimple-xh/cmsimple-xh/releases/tag/1.7.5 third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2021-42645?
CVE-2021-42645 has been scored as a critical severity vulnerability.
How to fix CVE-2021-42645?
To fix CVE-2021-42645, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42645 being actively exploited in the wild?
It is possible that CVE-2021-42645 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~12% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.