matrix-org/matrix-react-sdk · Security
HTML injection in search results via plaintext message highlighting
- GHSA ID
- GHSA-xv83-x443-7rmw
- CVE ID
- CVE-2023-30609
- Severity
- high
- Published
- Updated
- CVSS
- 8.2 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
- CVSS v3
- 8.2 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L
Description
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 for finding the injection and to S1m for finding possible XSS vectors.
Patches
Version 3.71.0 of the SDK fixes the issue.
Workarounds
Restarting the client will clear the injection.
CWEs
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- 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/matrix-org/matrix-react-sdk/commit/bf182bc94556849d7acdfa0e5fdea2aa129ea826 ↗
- https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.71.0 ↗
- https://github.com/advisories/GHSA-xv83-x443-7rmw ↗