CVE-2024-42347: Matrix SDK for React's URL preview setting for a room is controllable by the HS

August 6, 2024

A malicious homeserver could manipulate a user’s account data to cause the client to enable URL previews in end-to-end encrypted rooms, in which case any URLs in encrypted messages would be sent to the server.

References

github.com/advisories/GHSA-f83w-wqhc-cfp4
github.com/matrix-org/matrix-react-sdk
github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-f83w-wqhc-cfp4
nvd.nist.gov/vuln/detail/CVE-2024-42347

Code Behaviors & Features

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