7.5

CVE-2019-11842: matrix sydent

CVSS: 7.5v3.0HighModified
AliasesGHSA-gwf7-vfjf-wf6xPYSEC-2019-185PYSEC-2026-2620
Published 09-05-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-11842 is a high (CVSS 7.5) vulnerability in matrix sydent. EPSS estimates a 1.80% chance of exploitation in the next 30 days, higher than 78% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
1.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-6076-1

Timeline

  1. 09-05-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 4 sources · 3 versions

EPSS trend

Probability

1.80%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

0.00 pp

From 1.80% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Matrix2 products
PyPI2 products
  • matrix-sydent< 1.0.3
  • matrix-synapse< 0.99.3.1
Debian1 product
  • matrix-synapse< 0.99.2-5
Ubuntu1 product
  • matrix-synapse< 0.24.0+dfsg-1ubuntu0.1~esm1

4 vendors · 6 products

References

10 links