CVE-2022-25069
📋 TL;DR
Mark Text v0.16.3 contains a DOM-based cross-site scripting vulnerability in pasteCtrl.js that allows attackers to inject malicious scripts. When exploited, this can lead to remote code execution by tricking users into pasting crafted content. All users of the affected version are vulnerable.
💻 Affected Systems
- Mark Text
📦 What is this software?
Marktext by Marktext
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise via remote code execution, allowing attacker to execute arbitrary commands, steal data, or install malware.
Likely Case
Session hijacking, credential theft, or data exfiltration through malicious script execution in user's context.
If Mitigated
Limited impact with proper input validation and output encoding; script execution confined to browser sandbox.
🎯 Exploit Status
Exploitation requires user to paste malicious content; proof-of-concept available in GitHub issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.17.0 and later
Vendor Advisory: https://github.com/marktext/marktext/issues/2990
Restart Required: Yes
Instructions:
1. Download latest version from official repository. 2. Uninstall old version. 3. Install new version. 4. Restart system.
🔧 Temporary Workarounds
Disable paste functionality
allTemporarily disable paste operations in Mark Text to prevent exploitation
Use alternative editor
allSwitch to a different markdown editor until patched
🧯 If You Can't Patch
- Restrict Mark Text usage to trusted documents only
- Implement application whitelisting to prevent unauthorized execution
🔍 How to Verify
Check if Vulnerable:
Check Help → About in Mark Text; if version is 0.16.3 or earlier, you are vulnerable.Check Version:
On Linux/macOS: marktext --version; On Windows: Check About in application menuVerify Fix Applied:
Verify version is 0.17.0 or later in Help → About menu.📡 Detection & Monitoring
Log Indicators:
- Unusual paste operations with long payloads
- Script execution errors in application logs
Network Indicators:
- Outbound connections to unexpected domains after paste operations
SIEM Query:
process_name:"Mark Text" AND (event_type:"paste" OR event_type:"script_execution")