matrix-org/matrix-react-sdk · Security
File upload local preview can run embedded scripts after user interaction
- GHSA ID
- GHSA-8796-gc9j-63rv
- Severity
- medium
- Published
- Updated
- CVSS
- 4.2 · CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
- CVSS v3
- 4.2 · CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Description
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.
CWEs
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')