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CVE-2023-38690

26
FAUCET Score

CVE-2023-38690 is a critical vulnerability affecting matrix-appservice-irc, a Node.js IRC bridge for Matrix, prior to version 1.0.1. An attacker can craft commands with newlines within a channel name, leading to arbitrary command execution on the IRC bridge bot. This vulnerability carries a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there are no robust workarounds, disabling dynamic channels can mitigate the most common exploitation method. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1CPE matchmatch criteria
cpe:2.3:a:matrix:matrix_irc_bridge:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 36th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
harborpatch availablevia llm_extracted
Fixed in: matrix-appservice-irc 1.0.1, matrix-hookshot 4.4.1, matrix-appservice-slack 2.1.2, matrix-appservice-bridge 9.0.1 (and 8.1.2)
View patch
netgearpatch availablevia llm_extracted
Fixed in: matrix-appservice-irc 1.0.1
View patch
npmpatch availablevia ghsa
Product: matrix-appservice-ircFixed in: 1.0.1
phoenix_contactpatch availablevia llm_extracted
Fixed in: matrix-appservice-irc 1.0.1, matrix-hookshot 4.4.1, matrix-appservice-slack 2.1.2, matrix-appservice-bridge 9.0.1 (and 8.1.2)
View patch

Vendor Advisories (4)

npmGHSA-3pmj-jqqp-2mj3medium

matrix-appservice-irc IRC command injection via admin commands containing newlines

Aug 4, 2023
netgearllm-netgear-9628b839cbbf84aeHIGH

IRC command injection via admin commands containing newlines

Jul 26, 2023
harborllm-harbor-1670ef3d989ba299HIGH

Multiple High Severity Vulnerabilities in Matrix Bridges

Jul 12, 2023
phoenix_contactllm-phoenix_contact-c12d9603f79c2712HIGH

Security Updates for Matrix Bridges: OpenID Token Exchange, IRC Command Injection, and Message Leak Vulnerabilities

Jul 10, 2023

References

github.com / matrix-org/matrix-appservice-irc/commit/0afb064635d37e039067b5b3d6423448b93026d3
Patch
github.com / matrix-org/matrix-appservice-irc/releases/tag/1.0.1
Release Notes
github.com / matrix-org/matrix-appservice-irc/security/advisories/GHSA-3pmj-jqqp-2mj3
Third Party Advisory