5.7

CVE-2021-29432: matrix-org sydent Improper Input Validation

CVSS: 5.7v3.1MediumModified
AliasesGHSA-mh74-4m5g-fcjxPYSEC-2021-23
Published 15-04-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-29432 is a medium (CVSS 5.7) Improper Input Validation vulnerability in matrix-org sydent. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.1% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.7/10
010
Medium · v3.1 (NVD)
EPSS score
0.93%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Sydent is a reference matrix identity server. A malicious user could abuse Sydent to send out arbitrary emails from the Sydent email address. This could be used to construct plausible phishing emails, for example. This issue has been fixed in 4469d1d.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

0.93%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.93% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.93%

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

Matrix1 product
Matrix-org1 product
PyPI1 product
  • matrix-sydent< 4469d1d42b2b1612b70638224c07e19623039c42 | < 2.3.0

3 vendors · 3 products

References

7 links