CVE-2021-21320 User content sandbox can be confused into opening arbitrary documents

2021-03-0202:45:16

CWE-345

GitHub_M

www.cve.org

cve-2021-21320

user content sandbox

arbitrary documents

matrix-react-sdk

react javascript

blob origin

security fix

CVSS3

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N

AI Score

4.9

Confidence

High

EPSS

0.001

Percentile

38.2%

JSON

matrix-react-sdk is an npm package which is a Matrix SDK for React Javascript. In matrix-react-sdk before version 3.15.0, the user content sandbox can be abused to trick users into opening unexpected documents. The content is opened with a blob origin that cannot access Matrix user data, so messages and secrets are not at risk. This has been fixed in version 3.15.0.

CNA Affected

[
  {
    "product": "matrix-react-sdk",
    "vendor": "matrix-org",
    "versions": [
      {
        "status": "affected",
        "version": "< 3.15.0"
      }
    ]
  }
]