HOMEVULNERABILITIESCVE-2023-38700
LOW

CVE-2023-38700

CWE-200Published: August 4, 2023· Updated: Jun 17, 2026

3.7
CVSS v3.1

Official Description

matrix-appservice-irc is a Node.js IRC bridge for Matrix. Prior to version 1.0.1, it was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target. Version 1.0.1n fixes this issue. As a workaround, set the `matrixHandler.eventCacheSize` config value to `0`. This workaround may impact performance.

NVD Source

Technical Analysis

CVE-2023-38700 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

matrix1 product(s)
matrix irc bridge
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75
PATCHhttps://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75
ADVISORYhttps://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q
ADVISORYhttps://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q

All References (6)

→
https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75Patch
→
https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1Release Notes
→
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4qVendor Advisory
→
https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75Patch
→
https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1Release Notes
→
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4qVendor Advisory

Quick Facts

CVE IDCVE-2023-38700
CVSS Score3.7 / 10
SeverityLOW
WeaknessCWE-200
CISA KEVNo
Affected1 vendor(s)
PublishedAug 4, 2023

Related CVEs (CWE-200)

CVE-2008-0082
10.0
CVE-2008-3914
10.0
CVE-2025-61481
10.0
CVE-2025-22612
10.0
CVE-2026-40965
10.0
CVE-2008-3010
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-38700 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2023-38700·NVD