CVE-2025-25187
📋 TL;DR
This vulnerability in Joplin allows attackers to execute arbitrary code on a user's system by injecting malicious JavaScript into note titles. Users who receive notes from untrusted sources and use Ctrl+P search functionality are affected. The vulnerability combines HTML injection with Electron's nodeIntegration setting to achieve remote code execution.
💻 Affected Systems
- Joplin
📦 What is this software?
Joplin by Joplin Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands, steal sensitive data, install malware, or gain persistent access to the victim's machine.
Likely Case
Attackers could steal local files, credentials, or other sensitive information stored on the system, potentially leading to data breaches or further lateral movement.
If Mitigated
With proper input sanitization and Content Security Policy, the impact would be limited to HTML injection without JavaScript execution.
🎯 Exploit Status
Requires user interaction (opening malicious note and using Ctrl+P search) but exploitation chain is straightforward once malicious note is loaded.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.24
Vendor Advisory: https://github.com/laurent22/joplin/security/advisories/GHSA-9gfv-q6wj-fr3c
Restart Required: No
Instructions:
1. Open Joplin application. 2. Go to Help > Check for updates. 3. Follow prompts to update to version 3.1.24 or later. 4. Alternatively, download latest version from https://joplinapp.org/ and install over existing installation.
🔧 Temporary Workarounds
No known workarounds
allThe vendor advisory states there are no known workarounds for this vulnerability.
🧯 If You Can't Patch
- Avoid opening notes from untrusted sources and disable automatic note synchronization from unknown locations.
- Temporarily disable Ctrl+P search functionality or avoid using it on notes from external sources.
🔍 How to Verify
Check if Vulnerable:
Check Joplin version in Help > About. If version is below 3.1.24, the system is vulnerable.Check Version:
On Joplin desktop: Help > About shows version. Command line: joplin --version (if installed via package manager).Verify Fix Applied:
After updating, verify version is 3.1.24 or higher in Help > About.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from Joplin.exe/Joplin.app
- Suspicious file access patterns from Joplin process
- Network connections to unexpected destinations from Joplin
Network Indicators:
- Outbound connections to suspicious domains from Joplin process
- Unexpected data exfiltration patterns
SIEM Query:
Process creation where parent_process_name contains 'joplin' AND (process_name contains 'cmd.exe' OR process_name contains 'powershell.exe' OR process_name contains 'bash' OR process_name contains 'sh')🔗 References
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src
- https://github.com/laurent22/joplin/blob/2fc9bd476b0d9abcddb0a46f615a48333779d225/packages/app-desktop/plugins/GotoAnything.tsx#L558
- https://github.com/laurent22/joplin/commit/360ece6f8873ef81afbfb98b25faad696ffccdb6
- https://github.com/laurent22/joplin/security/advisories/GHSA-9gfv-q6wj-fr3c
- https://github.com/laurent22/joplin/security/advisories/GHSA-9gfv-q6wj-fr3c
