How severe is CVE-2022-39202?

CVE-2022-39202 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2022-39202 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-39202?

CVE-2022-39202 affects Matrix Matrix Irc Bridge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-39202?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-39202 published?

CVE-2022-39202 was published on 2022-09-13 and last updated on 2026-06-17.

CVE-2022-39202

CVE-2022-39202 is a medium-severity vulnerability in Matrix Matrix Irc Bridge with a CVSS 3.x base score of 4.3. 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-269.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Matrix Matrix Irc Bridge
Published: 2022-09-13
Last modified: 2026-06-17

Description

matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. The Internet Relay Chat (IRC) protocol allows you to specify multiple modes in a single mode command. Due to a bug in the underlying matrix-org/node-irc library, affected versions of matrix-appservice-irc perform parsing of such modes incorrectly, potentially resulting in the wrong user being given permissions. Mode commands can only be executed by privileged users, so this can only be abused if an operator is tricked into running the command on behalf of an attacker. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround users should refrain from entering mode commands suggested by untrusted users. Avoid using multiple modes in a single command.

Frequently asked questions

What is CVE-2022-39202?: matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. The Internet Relay Chat (IRC) protocol allows you to specify multiple modes in a single mode command. Due to a bug in the underlying matrix-org/node-irc library, affected versions of matrix-appservice-irc perform parsing of such modes incorrectly, potentially resulting in the wrong user being given permissions. Mode commands can only be executed by privileged users, so this can only be abused if an operator is tricked into running the command on behalf of an attacker. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround users should refrain from entering mode commands suggested by untrusted users. Avoid using multiple modes in a single command.
How severe is CVE-2022-39202?: CVE-2022-39202 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2022-39202 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-39202?: CVE-2022-39202 affects Matrix Matrix Irc Bridge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-39202?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-39202 published?: CVE-2022-39202 was published on 2022-09-13 and last updated on 2026-06-17.

References

Affected products (1)

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

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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…
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