5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-45279

CVE-2023-45279: Yamcs Cross-site Scripting vulnerability

Yamcs 5.8.6 allows XSS (issue 1 of 2). It comes with a Bucket as its primary storage mechanism. Buckets allow for the upload of any file. There's a way to upload a display referencing a malicious JavaScript file to the bucket. The user can then open the uploaded display by selecting Telemetry from the menu and navigating to the display.

(GitHub Advisory)

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CVE-2023-45279

CVE-2023-45279:

5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.yamcs:yamcs	maven	< 5.8.7	5.8.7

Technical Details

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Root Cause Analysis

The vulnerability chain involves two key components: 1) The display rendering mechanism that executes referenced JavaScript without proper context isolation/sanitization (high confidence based on described attack flow), and 2) The bucket storage system that permits unrestricted file uploads (medium confidence as it's implied but not explicitly described in available sources). The LinkedIn article specifically mentions JavaScript execution in displays occurs in a broad context, and the CVE description emphasizes the bucket upload capability as the entry point. While exact function names aren't visible in diffs, the architectural components handling these features are clearly implicated.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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