CVE-2021-42645

Cmsimple Xh vulnerability

CVSS

10.0

EPSS

4.4%

EPSS pct

90th

Exploited

No known

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.

Affected vendor

Cmsimple Xh

Affected product

Cmsimple Xh

CVSS vector

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

Weakness type (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Published

2022-05-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2021-42645

Confirm whether Cmsimple Xh Cmsimple Xh is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-42645.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-42645

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-42645 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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