CVE-2019-11340

MediumCVSS 5.9/10Last modified Jun 17, 2026

Description

util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on user@bad.example.net@good.example.com returns the user@bad.example.net substring.

Metrics

CVSS 3.0 5.9/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fcPatch, Third Party Advisory
https://github.com/matrix-org/sydent/compare/7c002cd...09278fbPatch, Third Party Advisory
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/Release Notes, Vendor Advisory
https://twitter.com/matrixdotorg/status/1118934335963500545Third Party Advisory
https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fcPatch, Third Party Advisory
https://github.com/matrix-org/sydent/compare/7c002cd...09278fbPatch, Third Party Advisory
https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/Release Notes, Vendor Advisory
https://twitter.com/matrixdotorg/status/1118934335963500545Third Party Advisory

Timeline

Published: Apr 19, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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