🛡️ CVE-2022-39203
🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-269 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-269
Public Exploit ✅ No
Source NVD
Published 2022-09-15
Updated 2026-06-08
Modified 2023-11-08
Fix URL N/A

Affected Packages

Software From version Fixed in
matrix-appservice-irc
matrix-irc-bridge 0.35.0

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