Is CVE-2024-49362 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2024-49362 being exploited in the wild.

How severe is CVE-2024-49362?

Low severity, with a CVSS score of 3.1, published 14 November 2024.

Which products and versions are affected?

joplin (npm) SEMVER:introduced=3.0.0,fixed=3.1.0.

Is there a fix for CVE-2024-49362?

Yes. joplin (npm): upgrade to 3.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2024-49362 attacked?

It is attacked with local access.

Am I affected by CVE-2024-49362?

Check whether you run joplin (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2024-49362: Joplin Desktop remote code execution in markdown preview links

CVE-2024-49362 · Severity: low · CVSS 3.1 · Published 2024-11-14

Joplin is a popular note-taking application for desktop that allows users to view and edit markdown documents. A vulnerability in the markdown preview feature allows attackers to execute arbitrary shell commands when a user clicks on a malicious link embedded in an untrusted note, compromising the user's entire system with the privileges of the application.

Technologies: joplin (npm). Vendors: npm.

Quick answers

Is CVE-2024-49362 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2024-49362 being exploited in the wild.
How severe is CVE-2024-49362?: Low severity, with a CVSS score of 3.1, published 14 November 2024.
Which products and versions are affected?: joplin (npm) SEMVER:introduced=3.0.0,fixed=3.1.0.
Is there a fix for CVE-2024-49362?: Yes. joplin (npm): upgrade to 3.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2024-49362 attacked?: It is attacked with local access.
Am I affected by CVE-2024-49362?: Check whether you run joplin (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

joplin (npm): upgrade to 3.1.0 or later
```
npm install joplin@3.1.0
```

Technical details

The vulnerability is a code execution flaw stemming from insufficient sanitization of HTML anchor tags introduced by the Mermaid diagram library in markdown previews. Joplin uses the `data-from-md` attribute to distinguish internally-safe links from external ones, but fails to sanitize this attribute when Mermaid renders diagram elements. An attacker can inject `<a>` tags with crafted `data-from-md` attributes and `href` attributes pointing to local HTML files. Since the preview iframe lacks sandbox isolation and shares the same origin as the parent Electron window (which has `nodeIntegration: true` and `contextIsolation: false`), scripts in the referenced HTML file can access Node.js APIs via `window.parent.require()` and execute arbitrary system commands. The attack requires the victim to have a malicious HTML file locally accessible and to click the crafted link in an untrusted note.

Affected products

Joplin Desktop 3.0.0 before 3.1.0

Identifiers

CVE-2024-49362
GHSA-hff8-hjwv-j9q7

Timeline

2024-11-14: disclosed
2024-11-14: patched: Fix available in version 3.1.0

References

https://github.com/laurent22/joplin/security/advisories/GHSA-hff8-hjwv-j9q7

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