matrix-appservice-irc IRC command injection via admin commands containing newlines
Impact
It is possible to craft a command with newlines which would not be properly parsed. This would mean you could pass a string of commands as a channel name, which would then be run by the IRC bridge bot.
Patches
Versions 1.0.1 and above are patched.
Workarounds
There are no robust workarounds to the bug. You can disable dynamic channels in the config to disable the most common execution method but others may exist. It is highly recommended to upgrade the bridge.
Credits
Discovered and reported by Val Lorentz.
For more information
If you have any questions or comments about this advisory email us at security@matrix.org.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | matrix-appservice-irc | < 1.0.1 | 1.0.1 |
References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-3pmj-jqqp-2mj3
- https://nvd.nist.gov/vuln/detail/CVE-2023-38690
- https://github.com/matrix-org/matrix-appservice-irc/commit/0afb064635d37e039067b5b3d6423448b93026d3
- https://github.com/matrix-org/matrix-appservice-irc
- https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N- Weakness (CWE)
CWE-20- Platform
- npm
- Package
matrix-appservice-irc- Disclosed
- 04.08.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-3pmj-jqqp-2mj3 - CC BY 4.0
Vulnerability history: matrix-appservice-irc
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 9
- First → latest
- 05.2022 02.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 5
- Low 2
Disclosures per year
- 2022: 4
- 2023: 2
- 2024: 2
- 2025: 1
- 2026: 0
-
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