CVE-2024-43368 Trix has a Cross-Site Scripting (XSS) vulnerability on copy & paste
An attacker can execute arbitrary JavaScript via malicious copy-paste content in the Trix editor, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-43368?
CVE-2024-43368 is a medium-severity cross-site scripting vulnerability in basecamp trix, published on 14 Aug 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Trix editor, versions prior to 2.1.4, is vulnerable to XSS when pasting malicious code. This vulnerability is a bypass of the fix put in place for GHSA-qjqp-xr96-cj99. In pull request 1149, sanitation was added for Trix attachments with a `text/html` content type. However, Trix only checks the content type on the paste event's `dataTransfer` object. As long as the `dataTransfer` has a content type of `text/html`, Trix parses its contents and creates an `Attachment` with them, even if the attachment itself doesn't have a `text/html` content type. Trix then uses the attachment content to set the attachment element's `innerHTML`. An attacker could trick a user to copy and paste malicious code that would execute arbitrary JavaScript code within the context of the user's session, potentially leading to unauthorized actions being performed or sensitive information being disclosed. This vulnerability was fixed in version 2.1.4.
Weakness: CWE-79
Which versions are affected by CVE-2024-43368?
2 open source packages ship an affected version, including trix.
| Package | Affected | Fixed in |
|---|---|---|
trix npm | All versions | 2.1.4 |
trix npm | All versions | 2.1.4 |
How do I fix CVE-2024-43368?
Upgrade trix to 2.1.4 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-43368 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-43368 exists.
Sources
Also known as GHSA-qm2q-9f3q-2vcv.