Overview
This blog post focuses on the discovered vulnerability CVE-2025-56803. This vulnerability has been identified in Figma Desktop for Windows version 125.6.5, a popular designing tool used worldwide. The vulnerability is of critical importance because it allows an attacker to execute arbitrary OS commands. This can potentially lead to system compromise and data leakage, which can have severe consequences for both individuals and organizations.
The vulnerability arises due to a flaw in the local plugin loader which lacks proper validation, thus leading to possible Remote Code Execution (RCE). However, it’s important to note that the Supplier has disputed this claim, arguing that the behavior simply allows a local user to attack themselves via a local plugin and that the local build procedure, essential to the attack, is not executed for plugins shared to the Figma Community.
Vulnerability Summary
CVE ID: CVE-2025-56803
Severity: Critical (8.4 CVSS Score)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Figma Desktop for Windows | 125.6.5
How the Exploit Works
The exploit takes advantage of a command injection vulnerability in the local plugin loader of Figma Desktop for Windows version 125.6.5. An attacker can execute arbitrary OS commands by setting a crafted build field in the plugin’s manifest.json. This field is passed to child_process.exec without any form of validation, potentially leading to Remote Code Execution (RCE).
Conceptual Example Code
The following pseudocode demonstrates how an attacker might exploit this vulnerability by manipulating the manifest.json of a Figma plugin:
{
"name": "Malicious Plugin",
"build": "os.system('rm -rf /')", // arbitrary OS command
"main": "main.js",
"ui": "ui.html"
}In this conceptual example, the “build” field in the manifest.json contains a malicious OS command (`rm -rf /`), which, if executed, would delete all files in the system. Note that this is purely a hypothetical example and such a command should never be used in a real-world scenario.
