# CVE-2025-28389: PYSEC-2025-150 - Weak password requirements in OpenC3 COSMOS v6.0.0 allow attackers to bypass authentication via a brute force attack.

Source: https://junglewise.ai/threats/cve-2025-28389-pysec-2025-150-weak-password-requirements-in-openc3-cosmos-v6-0-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-06-13  
License: CC BY 4.0 with a link back

CVE-2025-28389 · Severity: low · CVSS 3.1 · Published 2025-06-13

Weak password requirements in OpenC3 COSMOS v6.0.0 allow attackers to bypass authentication via a brute force attack.

Technologies: [openc3 (PyPI)](https://junglewise.ai/threats/technologies/pypi-openc3). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-28389 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-28389 being exploited in the wild.

**How severe is CVE-2025-28389?** Low severity, with a CVSS score of 3.1, published 13 June 2025.

**Which products and versions are affected?** openc3 (PyPI) ECOSYSTEM:introduced=0,last_affected=6.0.0.

**Is there a fix for CVE-2025-28389?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-28389?** Check whether you run openc3 (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- openc3 (PyPI) ECOSYSTEM:introduced=0,last_affected=6.0.0

## Identifiers

- CVE-2025-28389
- PYSEC-2025-150

## Related threats

- [OpenC3 COSMOS privilege escalation via Script Runner API bypass](https://junglewise.ai/threats/cve-2026-42088-openc3-cosmos-privilege-escalation-via-script-runner-api-bypass)
- [OpenC3 COSMOS SQL injection in QuestDB Time-Series Database](https://junglewise.ai/threats/cve-2026-42087-openc3-cosmos-sql-injection-in-questdb-time-series-database)
- [OpenC3 COSMOS Self-XSS in Command Sender](https://junglewise.ai/threats/cve-2026-42086-openc3-cosmos-self-xss-in-command-sender)
- [OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.](https://junglewise.ai/threats/cve-2026-42085-openc3-cosmos-path-traversal-in-save-tool-config)
- [OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.](https://junglewise.ai/threats/cve-2026-42084-openc3-cosmos-unverified-password-change-via-session-token)