Home/CVE/Sydent is a reference matrix identity server. A malicious user could abuse Sydent to send out arbitrary emails from the
CVE

CVE-2021-29432

Sydent is a reference matrix identity server. A malicious user could abuse Sydent to send out arbitrary emails from the

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.

MEDIUM · CVSS 5.3 EPSS 0.0025
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

1
matrix sydent< 2.3.0
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI matrix-sydent MODERATE fixed in 2.3.0
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42PatchThird Party Advisory
https://github.com/matrix-org/sydent/releases/tag/v2.3.0Release NotesThird Party Advisory
https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjxPatchThird Party Advisory
https://pypi.org/project/matrix-sydent/ProductThird Party Advisory
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