What’s Vulnerable › Vulnerabilities

CVE-2021-30502

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-25 · updated 2026-06-17

Description

The unofficial vscode-ghc-simple (aka Simple Glasgow Haskell Compiler) extension before 0.2.3 for Visual Studio Code allows remote code execution via a crafted workspace configuration with replCommand.

Affected products

• Simple Glasgow Haskell Compiler Project Simple Glasgow Haskell Compiler: before 0.2.3 — fixed in 0.2.3

How to fix

Upgrade to a fixed version: Simple Glasgow Haskell Compiler Project Simple Glasgow Haskell Compiler 0.2.3. Check the vendor advisory for mitigations.

References

• https://github.com/dramforever/vscode-ghc-simple/blob/master/CHANGELOG.md#v023
• https://github.com/dramforever/vscode-ghc-simple/commit/bc7f6f0b857dade46ea51496d8bd1a4edef39b46
• https://github.com/dramforever/vscode-ghc-simple/releases
• https://vuln.ryotak.me/advisories/38
• https://github.com/dramforever/vscode-ghc-simple/blob/master/CHANGELOG.md#v023
• https://github.com/dramforever/vscode-ghc-simple/commit/bc7f6f0b857dade46ea51496d8bd1a4edef39b46
• https://github.com/dramforever/vscode-ghc-simple/releases
• https://vuln.ryotak.me/advisories/38

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