File upload local preview can run embedded scripts after user interaction

高 7.8CVE-2021-32622 · GHSA-8796-gc9j-63rv · GHSA-cg57-p69r-3m7p · 17/05/2021 公開 · 17/06/2026 更新

要点

CVE-2021-32622 は matrix-react-sdk (matrix-react-sdk project), matrix-react-sdk に影響する深刻度「高」 (CVSS 7.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.37%（全脆弱性の 31.3% より高い）。
対処：3.21.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
matrix-react-sdk matrix-react-sdk_project	`< 3.21.0`	`3.21.0`
matrix-react-sdk npm	`< 3.21.0`	`3.21.0`

概要

Impact

When uploading a file, the local file preview can lead to execution of scripts embedded in the uploaded file, but only after several user interactions to open the preview in a separate tab. This only impacts the local user while in the process of uploading. It cannot be exploited remotely or by other users.

Patches

This has been fixed by https://github.com/matrix-org/matrix-react-sdk/pull/5981, which is included in 3.21.0.

Workarounds

There are no known workarounds.

NVD の説明

Matrix-React-SDK is a react-based SDK for inserting a Matrix chat/voip client into a web page. Before version 3.21.0, when uploading a file, the local file preview can lead to execution of scripts embedded in the uploaded file. This can only occur after several user interactions to open the preview in a separate tab. This only impacts the local user while in the process of uploading. It cannot be exploited remotely or by other users. This vulnerability is patched in version 3.21.0.