Skip to main content

Cosmos EUVDEUVD-2025-18280

| CVE-2025-28380 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2025-06-13 cve@mitre.org
XSS Cosmos Openc3
6.1
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-79
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Sign in to read
Impact

Attackers can steal session cookies, redirect users to malicious sites, deface content, or perform actions on behalf of authenticated users. With a CVSS score of 6.1 (MEDIUM), this represents a moderate risk.
Exploit ScenarioDerived

An attacker injects a JavaScript payload into a vulnerable input field. When another user views the page, the script executes in their browser, stealing their session token.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 14, 2026

A cross-site scripting (XSS) vulnerability in OpenC3 COSMOS before v6.0.2 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the URL parameter.

Earlier versions of this analysis (1)
v1 Mar 14, 2026 - 21:34 CVSS 6.1

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

Affected VersionsENISA

n/a n/a

Affected Packages

pypi openc3 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Sign in to check
Technical ContextAI · show details

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

Know when Cosmos gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources
Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 6.1 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
PoC Detected
Oct 27, 2025 - 15:15 vuln.today
Public exploit code
CVE Published
Jun 13, 2025 - 14:15 nvd
MEDIUM 6.1

Executive ViewAI

Why It Matters

Organizations using OpenC3 COSMOS should be aware of moderate risk from CVE-2025-28380, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.

Threat Intelligence Overview

EPSS Score
0.1%
Top 74% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium
EUVD NVD CVE.org EPSS GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

More in Cosmos

View all
CVE-2025-28386 CRITICAL POC
9.8 Jun 13

Critical remote code execution vulnerability in OpenC3 COSMOS v6.0.0's Plugin Management component that allows unauthent
CVE-2025-28388 CRITICAL POC
9.8 Jun 13

OpenC3 COSMOS versions before v6.0.2 contain hardcoded credentials embedded in the Service Account, allowing unauthentic
CVE-2025-28389 CRITICAL POC
9.8 Jun 13

Critical authentication bypass vulnerability in OpenC3 COSMOS v6.0.0 caused by weak password requirements that enable br
CVE-2025-28384 CRITICAL POC
9.1 Jun 13

Critical directory traversal vulnerability in OpenC3 COSMOS versions before 6.1.0 affecting the /script-api/scripts/ end
CVE-2025-28382 HIGH POC
7.5 Jun 13

Directory traversal vulnerability in OpenC3 COSMOS versions before 6.1.0 that allows unauthenticated remote attackers to
CVE-2025-28381 HIGH POC
7.5 Jun 13

A security vulnerability in OpenC3 COSMOS (CVSS 7.5) that allows attackers. Risk factors: public PoC available.
CVE-2026-42088 CRITICAL
9.6 May 04

Privilege escalation in OpenC3 COSMOS allows low-privileged authenticated users to bypass API authorization and perform

CVE-2026-42087 CRITICAL
9.6 May 04

SQL injection in OpenC3 COSMOS 6.7.0 to 7.0.0-rc2 allows authenticated users with minimal 'tlm' (telemetry viewer) privi
CVE-2026-77601 HIGH POC
8.8 Sep 23

Authenticated OS command injection in OpenC3 COSMOS 5.12.0 through 7.2.1 allows a user with a valid session to run arbit
CVE-2024-47529 MEDIUM POC
4.8 Oct 02

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems.

CVE-2026-42084 HIGH
8.1 May 04

OpenC3 COSMOS password change functionality accepts valid session tokens in lieu of current passwords, enabling attacker
CVE-2026-77394 HIGH POC
7.6 Sep 23

OpenC3 COSMOS versions 5.0.6 through 7.2.x contain a stored cross-site scripting flaw in the shared-screen BUTTON widget

Same weakness CWE-79 – Cross-site Scripting (XSS)

View all
CVE-2020-3580 MEDIUM POC
6.1
CVE-2013-7389 MEDIUM POC
4.3
CVE-2021-25299 MEDIUM POC
6.1
CVE-2014-2120 MEDIUM
6.1
CVE-2023-40000 HIGH POC
8.3
CVE-2016-8581 MEDIUM POC
6.1
CVE-2013-5223 MEDIUM POC
5.4
CVE-2025-52367 MEDIUM POC
5.4

Same technique XSS

View all
CVE-2017-9248 CRITICAL POC
9.8
CVE-2013-1710 CRITICAL POC
10.0
CVE-2024-52875 HIGH POC
8.8

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-28380 ADVISORY https://openc3.com ADVISORY https://visionspace.com/openc3-cosmos-a-security-assessment-of-an-open-source-mission-framework REF https://github.com/OpenC3/cosmos/commit/12e3e12307afd3dbfc306f20d60400989db89883 REF https://github.com/OpenC3/cosmos/pull/1816 REF https://github.com/OpenC3/cosmos/releases/tag/v6.0.2 REF https://openc3.com/

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy