CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
18.8%
matrix-react-sdk is vulnerable to Information Disclosure. The vulnerability is due to a malicious homeserver manipulating a user’s account data to enable URL previews in encrypted rooms, causing any URLs in encrypted messages to be sent to the server. Attackers can use this to intercept URLs in encrypted communications, potentially exposing sensitive information.