CVE-2019-11842

HIGH

Matrix Sydent <1.0.3 & Synapse <0.99.3.1 - Info Disclosure

Title source: llm

Description

An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.

References (1)

[Vendor Advisory] https://matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-a/

Scores

CVSS v3 7.5

EPSS 0.0053

EPSS Percentile 67.5%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-338

Status published

Products (4)

matrix/sydent < 1.0.3

matrix/synapse < 0.99.3.1

pypi/matrix-sydent 0 - 1.0.3PyPI

pypi/matrix-synapse 0 - 0.99.3.1PyPI

Published May 09, 2019

Tracked Since Feb 18, 2026