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Vulnerability record · CVE-2021-42645 · published 10 May 2022

CVE-2021-42645: Cmsimple-xh cmsimple xh unrestricted file upload vulnerability

Cmsimple Xh · Cmsimple Xh

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.

10.0 CVSS 3.1 Critical EPSS 4.5% · top 8.8% CWE-434 · Unrestricted file upload
10.0CVSS 3.1 base score, v2 10.0
4.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Net-hunter121/CMSimple_XH-Unauth-RCE ExploitThird Party Advisory
https://github.com/cmsimple-xh/cmsimple-xh/releases/tag/1.7.5 Release NotesThird Party Advisory
https://github.com/Net-hunter121/CMSimple_XH-Unauth-RCE ExploitThird Party Advisory
https://github.com/cmsimple-xh/cmsimple-xh/releases/tag/1.7.5 Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-42645), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.