Quick answers
- Is CVE-2021-32622 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2021-32622 being exploited in the wild.
- How severe is CVE-2021-32622?
- Low severity, with a CVSS score of 3.1, published 10 February 2022.
- Which products and versions are affected?
- Matrix.org React SDK < 3.21.0; matrix-react-sdk (npm) SEMVER:introduced=0,fixed=3.21.0.
- Is there a fix for CVE-2021-32622?
- Yes. matrix-react-sdk (npm): upgrade to 3.21.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2021-32622 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2021-32622?
- Check whether you run Matrix.org React SDK or matrix-react-sdk (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
- matrix-react-sdk (npm): upgrade to 3.21.0 or later
npm install matrix-react-sdk@3.21.0
Technical details
The vulnerability is a cross-site scripting (XSS) issue in the file upload local preview functionality of matrix-react-sdk (CWE-74). Malicious scripts embedded in uploaded files can be executed in the browser context, but exploitation requires multiple user interactions: the attacker must craft a malicious file, the user must upload it, and then the user must explicitly open the preview in a separate browser tab. The attack is limited to the local uploading user's session and cannot be exploited remotely or affect other users. The vulnerability was fixed in version 3.21.0 by pull request #5981.
Affected products
- Matrix.org React SDK < 3.21.0
Identifiers
- CVE-2021-32622
- GHSA-8796-gc9j-63rv
- GHSA-cg57-p69r-3m7p
Timeline
- 2021-05-17: disclosed