CVE-2023-38700CWE-200

matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms

Low · published August 4, 2023

CVSS v3.1
3.5
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00599 · 48.0th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2023-08-04T18:05Z
EPSS history
Timeline
  • 04 AUG 18:05Z
    matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms
    cvelistv5