CVE-2022-39203
8.8 · HIGHOverview
CVE-2022-39203 is a high-severity vulnerability affecting matrix matrix_irc_bridge. It was published on September 13, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from matrix. Update matrix_irc_bridge to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| matrix | matrix_irc_bridge | >= 0, < 0.35.0 | Affected |
References
Frequently Asked Questions
What is CVE-2022-39203?
CVE-2022-39203 is a high-severity vulnerability affecting matrix matrix_irc_bridge. It was published on September 13, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2022-39203?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2022-39203?
Check the references section for vendor advisories and patches from matrix. Update matrix_irc_bridge to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2022-39203?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-39203 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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