matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround operators may disable dynamic channel joining via `dynamicChannels.enabled` to prevent users from joining new channels, which prevents any new channels being bridged outside of what is already bridged, and what is specified in the config.
History

Wed, 23 Apr 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-09-13T18:15:12.000Z

Updated: 2025-04-23T17:11:08.544Z

Reserved: 2022-09-02T00:00:00.000Z

Link: CVE-2022-39203

cve-icon Vulnrichment

Updated: 2024-08-03T12:00:42.590Z

cve-icon NVD

Status : Modified

Published: 2022-09-13T19:15:13.030

Modified: 2024-11-21T07:17:46.837

Link: CVE-2022-39203

cve-icon Redhat

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