TI-2021-18846 Aliases CVE-2021-42561 GHSA-3893-j6q6-whq8

An issue was discovered in CALDERA 2.8.1.

MEDIUM 56CWE-74Published 2022-01-12 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.19572 97th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mitre:caldera::::::::	up to 2.8.1	Vulnerable	MITRE

cpe:2.3:a:mitre:caldera:*:*:*:*:*:*:*:* Versions up to 2.8.1 Vulnerable ·MITRE

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-42561
2026-10-03 Alias added: GHSA-3893-j6q6-whq8

References

Exploit 1

https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42561-Command%20Injection%20Via%20the%20Human%20Plugin-MITRE%20Caldera

Advisory 1

https://github.com/mitre/caldera/releases

TI-2022-19658 MITRE CALDERA 4.1.0 allows stored XSS via app.contact.gist (aka the gist contact… CVSS 3.1MEDIUM 5.4
TI-2020-13738 A command injection vulnerability in the sandcat plugin of Caldera 2.3.1 and earlier… CVSS 3.1HIGH 8.8
TI-2021-18845 An issue was discovered in CALDERA 2.9.0. CVSS 3.1HIGH 8.8
TI-2021-18844 An issue was discovered in CALDERA 2.8.1. CVSS 3.1HIGH 8.8
TI-2021-18847 An issue was discovered in CALDERA 2.8.1. CVSS 3.1HIGH 8.1
TI-2021-18843 An issue was discovered in CALDERA 2.8.1. CVSS 3.1MEDIUM 6.1

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences