TI-2021-18844 Aliases CVE-2021-42559 GHSA-vmx9-qv3g-pj44

An issue was discovered in CALDERA 2.8.1.

MEDIUM 42CWE-77Published 2022-01-12 · Updated 2024-08-04

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-77.

Summary

An issue was discovered in CALDERA 2.8.1. It contains multiple startup "requirements" that execute commands when starting the server. Because these commands can be changed via the REST API, an authenticated user can insert arbitrary commands that will execute when the server is restarted.

Why it matters now

EPSS 0.02021 81st 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-2021-42559
2026-10-03 Alias added: GHSA-vmx9-qv3g-pj44

References

Exploit 1

https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42559-Command%20Injection%20Via%20Configurations-MITRE%20Caldera

Other 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-2021-18846 An issue was discovered in CALDERA 2.8.1. CVSS 3.1HIGH 8.8
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-2021-18847 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