CVE-2021-43908

MEDIUM

Visual Studio Code - Spoofing

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-43908. PoCs published by Sudistark.

AI-analyzed exploit summary This PoC exploits CVE-2021-43908, a vulnerability in Visual Studio Code that allows remote code execution via a crafted webview URL. The exploit uses a malicious HTML payload to escape the sandbox and execute arbitrary code by manipulating the file URI scheme.

Description

Visual Studio Code Spoofing Vulnerability

Exploits (1)

nomisec WORKING POC 9 stars
by Sudistark · poc
https://github.com/Sudistark/vscode-rce-electrovolt

This PoC exploits CVE-2021-43908, a vulnerability in Visual Studio Code that allows remote code execution via a crafted webview URL. The exploit uses a malicious HTML payload to escape the sandbox and execute arbitrary code by manipulating the file URI scheme.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Visual Studio Code (versions affected by CVE-2021-43908)
No auth needed
Prerequisites: Victim must visit a malicious URL or open a crafted HTML file in VS Code · VS Code must be running with the vulnerable extension loaded
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 4.3
EPSS 0.0269
EPSS Percentile 84.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Details

Status published
Products (1)
microsoft/visual_studio_code
Published Dec 15, 2021
Tracked Since Feb 18, 2026