# 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.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **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:** Yes
- **Published:** 14 Aug 2024
- **Updated:** 15 Aug 2024
- **Also known as:** GHSA-qm2q-9f3q-2vcv

## 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 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2024-43368?

2 open source packages ship an affected version, including trix.


| Package | Ecosystem | 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.

## Is CVE-2024-43368 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-43368 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43368 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-43368 exists.

Affected packages and fixed versions:
- trix (npm): affected all versions; fixed in 2.1.4
- trix (npm): affected all versions; fixed in 2.1.4

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-43368/ (Markdown: https://insights.sbomify.com/CVE-2024-43368/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43368
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43368
- OSV: https://osv.dev/vulnerability/CVE-2024-43368

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43368/
Summaries are generated and may contain mistakes; the official description above is the record.