CVE-2021-42561

Caldera vulnerability

CVSS

8.8

EPSS

19.6%

EPSS pct

97th

Exploited

No known

An issue was discovered in CALDERA 2.8.1. When activated, the Human plugin passes the unsanitized name parameter to a python "os.system" function. This allows attackers to use shell metacharacters (e.g., backticks "``" or dollar parenthesis "$()" ) in order to escape the current command and execute arbitrary shell commands.

Affected vendor

Mitre

Affected product

Caldera

CVSS vector

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

Weakness type (CWE)

CWE-74 — Injection

Published

2022-01-12

Risk analysis

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

Its EPSS score of 19.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-42561

Confirm whether Mitre Caldera is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-42561.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-42561

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-42561 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2021-42561?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2021-42561.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH

CVE-2016-0018

Windows 10 vulnerability

HIGH

CVE-2016-0019

Windows 10 vulnerability

HIGH

CVE-2016-0024

Edge vulnerability