CVE-2021-29432

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.

• CWE-20

• https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42Patch, Third Party Advisory
• https://github.com/matrix-org/sydent/releases/tag/v2.3.0Release Notes, Third Party Advisory
• https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjxPatch, Third Party Advisory
• https://pypi.org/project/matrix-sydent/Product, Third Party Advisory
• https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42Patch, Third Party Advisory
• https://github.com/matrix-org/sydent/releases/tag/v2.3.0Release Notes, Third Party Advisory
• https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjxPatch, Third Party Advisory
• https://pypi.org/project/matrix-sydent/Product, Third Party Advisory

Published

Apr 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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