TI-2021-18843 Aliases CVE-2021-42558 GHSA-jgxc-wj8j-5rmx

An issue was discovered in CALDERA 2.8.1.

LOW 29CWE-79Published 2022-01-12 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

An issue was discovered in CALDERA 2.8.1. It contains multiple reflected, stored, and self XSS vulnerabilities that may be exploited by authenticated and unauthenticated attackers.

Why it matters now

EPSS 0.01087 65th 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-2021-42558
2026-10-03 Alias added: GHSA-jgxc-wj8j-5rmx

References

Exploit 1

https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42558-Multiple%20XSS-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-2021-18844 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

See all 10 →

Sources

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