Emissary
CVE-2021-32094
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK
2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. |
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Alert meAnalysisAI
U.S. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. U.S. National Security Agency (NSA) Emissary 5.9.0 allows an authenticated user to upload arbitrary files. Affected products include: Nsa Emissary.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
U.S. National Security Agency (NSA) Emissary 5.9.0 allows an authenticated user to upload arbitrary files.
Threat Intelligence Overview
NVD
CVE.org
EPSS
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)NVD
Emissary is a P2P-based, data-driven workflow engine. Rated critical severity (CVSS 9.9), this vulnerability is remotely
Emissary is a P2P based data-driven workflow engine. Rated critical severity (CVSS 9.1), this vulnerability is remotely
The ConsoleAction component of U.S. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authe
The ConfigFileAction component of U.S. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low
A Cross-site scripting (XSS) vulnerability in the DocumentAction component of U.S. Rated medium severity (CVSS 6.1), thi
Shell command injection in Emissary workflow engine below version 8.39.0 allows high-privileged attackers with repositor
U.S. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch
Command injection in NSA Emissary P2P workflow engine (versions prior to 8.39.0) allows authenticated remote administrat
Emissary is a distributed, peer-to-peer, data-driven workflow framework. Rated high severity (CVSS 7.2), this vulnerabil
Emissary versions prior to 8.39.0 allow unauthenticated remote attackers to read arbitrary configuration files through p
Stored cross-site scripting in Emissary prior to 8.39.0 allows authenticated administrators to inject malicious javascri
GitHub PoC
Exploit-DB