Access Restriction Bypass Affecting matrix-appservice-bridge package, versions >=4.0.0 <8.1.2<9.0.1


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-JS-MATRIXAPPSERVICEBRIDGE-5821375
  • published6 Aug 2023
  • disclosed4 Aug 2023
  • creditUnknown

Introduced: 4 Aug 2023

CVE-2023-38691  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade matrix-appservice-bridge to version 8.1.2, 9.0.1 or higher.

Overview

matrix-appservice-bridge is a Bridging infrastructure for Matrix Application Services

Affected versions of this package are vulnerable to Access Restriction Bypass when using a foreign user's MXID in an OpenID exchange, allowing an attacker to impersonate users when using the provisioning API.

Workarounds

Users that are not able to upgrade to the fixed version can disable the provisioning API.

References

CVSS Scores

version 3.1