TI-2024-29389 Aliases CVE-2024-43795 GHSA-vfj8-5pj7-2f9g

OpenC3 COSMOS vulnerable to cross-site scripting in Login functionality (`GHSL-2024-128`)

LOW 24CWE-79Published 2024-10-02 · Updated 2024-10-31

Key facts

Attack vector: Network
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. The login functionality contains a reflected cross-site scripting (XSS) vulnerability. This vulnerability is fixed in 5.19.0. Note: This CVE only affects Open Source Edition, and not OpenC3 COSMOS Enterprise Edition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00483 41st percentileScored 2026-11-07

Fix Fixed cosmos (OpenC3): 5.19.0openc3 (RubyGems): 5.19.0+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenC3	cosmos	before 5.19.0	5.19.0	Patch available	CNA
—	openc3 (RubyGems)	before 5.19.0	5.19.0	Patch available	GHSA-vfj8-5pj7-2f9g
—	@openc3/tool-common (npm)	before 5.19.0	5.19.0	Patch available	GHSA-vfj8-5pj7-2f9g
—	openc3 (PyPI)	before 5.19.0	5.19.0	Patch available	GHSA-vfj8-5pj7-2f9g

cosmos VendorOpenC3 Affected before 5.19.0 Fixed in 5.19.0 Patch available CNA
openc3 (RubyGems) Vendor— Affected before 5.19.0 Fixed in 5.19.0 Patch available GHSA-vfj8-5pj7-2f9g
@openc3/tool-common (npm) Vendor— Affected before 5.19.0 Fixed in 5.19.0 Patch available GHSA-vfj8-5pj7-2f9g
openc3 (PyPI) Vendor— Affected before 5.19.0 Fixed in 5.19.0 Patch available GHSA-vfj8-5pj7-2f9g

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:openc3:cosmos:::::open_source:::*	before 5.19.0	Vulnerable	OpenC3

cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:* Versions before 5.19.0 Vulnerable ·OpenC3

Remediation

Fix · CNA cosmos (OpenC3) Fixed in 5.19.0
Fix · GHSA-vfj8-5pj7-2f9g openc3 (RubyGems) Fixed in 5.19.0 Advisory →
Fix · GHSA-vfj8-5pj7-2f9g @openc3/tool-common (npm) Fixed in 5.19.0 Advisory →
Fix · GHSA-vfj8-5pj7-2f9g openc3 (PyPI) Fixed in 5.19.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-43795
2026-10-03 Alias added: GHSA-vfj8-5pj7-2f9g

References

Patch 1

https://github.com/OpenC3/cosmos/commit/762d7e0e93bdc2f340b1e42acccedc78994a576e

Advisory 3

Other 3

TI-2025-20781 Weak password requirements in OpenC3 COSMOS v6.0.0 allow attackers to bypass authentication via a brute force attack. CVSS 3.1CRITICAL 9.8
TI-2025-20780 OpenC3 COSMOS before v6.0.2 was discovered to contain hardcoded credentials for the Service Account. CVSS 3.1CRITICAL 9.8
TI-2025-20779 A remote code execution (RCE) vulnerability in the Plugin Management component of OpenC3… CVSS 3.1CRITICAL 9.8
TI-2025-20778 An issue in the /script-api/scripts/ endpoint of OpenC3 COSMOS before 6.1.0 allows… CVSS 3.1CRITICAL 9.1
TI-2026-30456 OpenC3 COSMOS: Administrative Actions via the Script Runner Tool CVSS 3.1CRITICAL 9.6
TI-2026-30455 OpenC3 COSMOS: SQL Injection in QuestDB Time-Series Data Base CVSS 3.1CRITICAL 9.6

See all 14 →

Sources

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