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
Published Apr 19, 2019
5.9
MEDIUMCVSS 3.0
EPSS 1.88%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.88% (0.01876) | 78.67th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.88% (0.01876) | 78.47th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.18% (0.00180) | 55.60th | v3 (v2023.03.01) |
| Apr 12, 2024 | 0.18% (0.00180) | 54.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00122) | 44.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.18% (0.07176) | 80.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.50% (0.04504) | 76.47th | v1 |
| Jan 6, 2022 | 4.50% (0.04504) | 76.26th | v1 |
| Jan 5, 2022 | 1.04% (0.01040) | 65.70th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (6)
- https://github.com/advisories/GHSA-q9h8-gpw5-c95c Advisory
- https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc x_refsource_MISCPatchThird Party Advisory
- https://github.com/matrix-org/sydent/compare/7c002cd...09278fb x_refsource_MISCPatchThird Party Advisory
- https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/ x_refsource_MISCRelease NotesVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-11340
- https://twitter.com/matrixdotorg/status/1118934335963500545 x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-q9h8-gpw5-c95c | Advisory | |
| https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/matrix-org/sydent/compare/7c002cd...09278fb | x_refsource_MISCPatchThird Party Advisory | |
| https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/ | x_refsource_MISCRelease NotesVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-11340 | ||
| https://twitter.com/matrixdotorg/status/1118934335963500545 | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.