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CVE-2025-27146: matrix-appservice-irc is a Node.js IRC bridge for Matrix

18
Routine
LOW 2.7UPGRADE

CVE-2025-27146 is a low-severity flaw (CVSS 2.7) affecting matrix irc bridge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

matrix-appservice-irc is a Node.js IRC bridge for Matrix. The matrix-appservice-irc bridge up to version 3.0.3 contains a vulnerability which can lead to arbitrary IRC command execution as the puppeted user. The attacker can only inject commands executed as their own IRC user. The vulnerability has been patched in matrix-appservice-irc version 3.0.4.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score2.7 (Low)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededHigh
User interactionNone
EPSS exploit chance0.4% (top 66%)
CISA exploited listNo
WeaknessCWE-77, CWE-88
Published2025-02-25
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: matrix

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

matrix matrix irc bridge UPGRADE
Affected: < 3.0.4
Fixed in: 3.0.4
Safe to downgrade to: no unaffected older release
1. Check installed version
npm ls matrix-irc-bridge
2. UPGRADE to 3.0.4
npm install matrix-irc-bridge@">=3.0.4"
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-27146?

matrix irc bridge: upgrade to 3.0.4. Exact commands for each OS are on this page.

Is CVE-2025-27146 being exploited?

CVE-2025-27146 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-27146 affect?

CVE-2025-27146 affects matrix irc bridge. Severity is low (CVSS 2.7). matrix-appservice-irc is a Node.js IRC bridge for Matrix. The matrix-appservice-irc bridge up to version 3.0.3 contains a vulnerability which can lead to arbitrary IRC command execution as the puppeted user. The attacker can only inject com

How urgent is CVE-2025-27146?

Priority 18/100. No elevated risk signals yet.

Software pages

Node.js vulnerabilities

References

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