CVE-2023-30609: matrix-react-sdk vulnerable to HTML injection in search results via plaintext message highlighting
First published: Tue Apr 25 2023(Updated: )
### Impact Plain text messages containing HTML tags are rendered as HTML in the search results. To exploit this, an attacker needs to trick a user into searching for a specific message containing an HTML injection payload. Cross-site scripting is possible by including resources from `recaptcha.net` and `gstatic.com` which are included in the default CSP. Thanks to [Cadence Ember](https://cadence.moe/) for finding the injection and to [S1m](https://github.com/p1gp1g/) for finding possible XSS vectors. ### Patches Version 3.71.0 of the SDK fixes the issue. ### Workarounds Restarting the client will clear the injection.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| npm/matrix-react-sdk | <3.71.0 | 3.71.0 |
| Matrix React SDK | <3.71.0 |
Remedy
https://github.com/matrix-org/matrix-react-sdk/commit/bf182bc94556849d7acdfa0e5fdea2aa129ea826
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Reference Links
- https://github.com/matrix-org/matrix-react-sdk/commit/bf182bc94556849d7acdfa0e5fdea2aa129ea826
- https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.71.0
- https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-xv83-x443-7rmw
- https://nvd.nist.gov/vuln/detail/CVE-2023-30609
- https://github.com/advisories/GHSA-xv83-x443-7rmw (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-30609?
CVE-2023-30609 is considered a medium severity vulnerability due to potential cross-site scripting attacks.
How can I fix CVE-2023-30609?
To fix CVE-2023-30609, upgrade to matrix-react-sdk version 3.71.0 or later.
What type of attack is possible with CVE-2023-30609?
CVE-2023-30609 allows for cross-site scripting attacks by rendering plain text messages with HTML tags in search results.
Which software is affected by CVE-2023-30609?
CVE-2023-30609 affects versions of the matrix-react-sdk prior to 3.71.0.
What methods can an attacker use to exploit CVE-2023-30609?
An attacker can exploit CVE-2023-30609 by tricking a user into searching for a specific message that contains an HTML injection payload.
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