Nsa: >> Emissary >> 5.9.0 Security Vulnerabilities
Emissary is a P2P based data-driven workflow engine. In versions 8.42.0 and below, Executrix.getCommand() is vulnerable to OS command injection because it interpolates temporary file paths into a /bin/sh -c shell command string without any escaping or input validation. The IN_FILE_ENDING and OUT_FILE_ENDING configuration keys flow directly into these paths, allowing a place author who can write or modify a .cfg file to inject arbitrary shell metacharacters that execute OS commands in the JVM process's security context. The framework already sanitizes placeName via an allowlist before embedding it in the same shell string, but applies no equivalent sanitization to file ending values. No runtime privileges beyond place configuration authorship, and no API or network access, are required to exploit this vulnerability. This is a framework-level defect with no safe mitigation available to downstream implementors, as Executrix provides neither escaping nor documented preconditions against metacharacters in file ending inputs. This issue has been fixed in version 8.43.0.
CVSS Score
8.8
EPSS Score
0.001
Published
2026-04-18
Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.
CVSS Score
7.2
EPSS Score
0.001
Published
2026-04-07
Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the configuration API endpoint (/api/configuration/{name}) validated configuration names using a blacklist approach that checked for \, /, .., and trailing .. This could potentially be bypassed using URL-encoded variants, double-encoding, or Unicode normalization to achieve path traversal and read configuration files outside the intended directory. This vulnerability is fixed in 8.39.0.
CVSS Score
5.3
EPSS Score
0.001
Published
2026-04-07
Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, Mustache navigation templates interpolated configuration-controlled link values directly into href attributes without URL scheme validation. An administrator who could modify the navItems configuration could inject javascript: URIs, enabling stored cross-site scripting (XSS) against other authenticated users viewing the Emissary web interface. This vulnerability is fixed in 8.39.0.
CVSS Score
4.8
EPSS Score
0.0
Published
2026-04-07
Emissary is a P2P-based, data-driven workflow engine. Emissary version 6.4.0 is vulnerable to Server-Side Request Forgery (SSRF). In particular, the `RegisterPeerAction` endpoint and the `AddChildDirectoryAction` endpoint are vulnerable to SSRF. This vulnerability may lead to credential leaks. Emissary version 7.0 contains a patch. As a workaround, disable network access to Emissary from untrusted sources.
CVSS Score
7.2
EPSS Score
0.008
Published
2021-07-02
A Cross-site scripting (XSS) vulnerability in the DocumentAction component of U.S. National Security Agency (NSA) Emissary 5.9.0 allows remote attackers to inject arbitrary web script or HTML via the uuid parameter.
CVSS Score
6.1
EPSS Score
0.005
Published
2021-05-07
The ConfigFileAction component of U.S. National Security Agency (NSA) Emissary 5.9.0 allows an authenticated user to read arbitrary files via the ConfigName parameter.
CVSS Score
6.5
EPSS Score
0.004
Published
2021-05-07
U.S. National Security Agency (NSA) Emissary 5.9.0 allows an authenticated user to upload arbitrary files.
CVSS Score
8.8
EPSS Score
0.009
Published
2021-05-07
U.S. National Security Agency (NSA) Emissary 5.9.0 allows an authenticated user to delete arbitrary files.
CVSS Score
8.1
EPSS Score
0.003
Published
2021-05-07
The ConsoleAction component of U.S. National Security Agency (NSA) Emissary 5.9.0 allows a CSRF attack that results in injecting arbitrary Ruby code (for an eval call) via the CONSOLE_COMMAND_STRING parameter.
CVSS Score
8.8
EPSS Score
0.001
Published
2021-05-07
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