How severe is CVE-2022-29166?

CVE-2022-29166 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-29166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-29166?

CVE-2022-29166 affects Matrix Matrix Irc Bridge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-29166?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-29166 published?

CVE-2022-29166 was published on 2022-05-05 and last updated on 2026-06-17.

CVE-2022-29166

CVE-2022-29166 is a high-severity vulnerability in Matrix Matrix Irc Bridge with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 6.8
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Matrix Matrix Irc Bridge
Published: 2022-05-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-29166?: 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.
How severe is CVE-2022-29166?: CVE-2022-29166 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-29166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-29166?: CVE-2022-29166 affects Matrix Matrix Irc Bridge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-29166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-29166 published?: CVE-2022-29166 was published on 2022-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:matrix:matrix_irc_bridge:*:*:*:*:*:node.js:*:*

More vulnerabilities in Matrix Matrix Irc Bridge

CVE-2022-39203 — High (CVSS 8.8): matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of…
CVE-2023-38690 — Medium (CVSS 5.8): matrix-appservice-irc is a Node.js IRC bridge for Matrix. Prior to version 1.0.1, it is possible to craft a command…
CVE-2022-3971 — Medium (CVSS 4.6): A vulnerability was found in matrix-appservice-irc up to 0.35.1. It has been declared as critical. This vulnerability…
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