CVE-2023-37259
Description
matrix-react-sdk is a react-based SDK for inserting a Matrix chat/voip client into a web page. The Export Chat feature includes certain attacker-controlled elements in the generated document without sufficient escaping, leading to stored Cross site scripting (XSS). Since the Export Chat feature generates a separate document, an attacker can only inject code run from the `null` origin, restricting the impact. However, the attacker can still potentially use the XSS to leak message contents. A malicious homeserver is a potential attacker since the affected inputs are controllable server-side. This issue has been addressed in commit `22fcd34c60` which is included in release version 3.76.0. Users are advised to upgrade. The only known workaround for this issue is to disable or to not use the Export Chat feature.
How to fix
- matrix-react-sdk_project matrix-react-sdk3.76.0 or later
- matrix-react-sdk3.76.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| matrix-react-sdk_project matrix-react-sdk | 3.32.0 ≤ v < 3.76.0, 3.76.0 | 3.76.0 |
| matrix-react-sdknpm | 3.32.0 ≤ v < 3.76.0 | 3.76.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.