CVE-2022-29166

Name: CVE-2022-29166
Creator: NVD / NIST
Published: 2022-05-05T23:15:09.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2022-29166 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. matrix-appservice-irc is a Node.js IRC bridge for Matrix. The vulnerability in node-irc allows an attacker to manipulate a Matrix user into executing IRC commands by having them reply to a maliciously crafted message. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

matrix-appservice-irc is a Node.js IRC bridge for Matrix. The vulnerability in node-irc allows an attacker to manipulate a Matrix user into executing IRC commands by having them reply to a maliciously crafted message. The vulnerability has been patched in matrix-appservice-irc 0.33.2. Refrain from replying to messages from untrusted participants in IRC-bridged Matrix rooms. There are no known workarounds for this issue.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.92%

55.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Matrix	Matrix Irc Bridge	< 0.33.2

References

https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-37hr-348p-rmf4Third Party Advisory
https://matrix.org/blog/2022/05/04/0-34-0-security-release-for-matrix-appservice-irc-high-severityRelease Notes, Vendor Advisory
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-37hr-348p-rmf4Third Party Advisory
https://matrix.org/blog/2022/05/04/0-34-0-security-release-for-matrix-appservice-irc-high-severityRelease Notes, Vendor Advisory

Timeline

Published: May 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-29166?

How severe is CVE-2022-29166?

CVE-2022-29166 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2022-29166?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-29166?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST