CVE-2022-41904CWE-357

Element iOS is vulnerable due to missing decoration for events decrypted with untrusted Megolm sessions

Medium · published November 11, 2022

CVSS v3.1
6.4
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

Element iOS is an iOS Matrix client provided by Element. It is based on MatrixSDK. Prior to version 1.9.7, events encrypted using Megolm for which trust could not be established did not get decorated accordingly (with warning shields). Therefore a malicious homeserver could inject messages into the room without the user being alerted that the messages were not sent by a verified group member, even if the user has previously verified all group members. This issue has been patched in Element iOS 1.9.7. There are currently no known workarounds.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00465 · 39.3th percentile
Weakness
CWE-357 · Insufficient UI Warning of Dangerous Operations
Published
2022-11-11T00:00Z
EPSS history
Timeline
  • 11 NOV 00:00Z
    Element iOS is vulnerable due to missing decoration for events decrypted with untrusted Megolm sessions
    cvelistv5