Back
CVE-2021-29432
Malicious users could control the content of invitation emails
Medium5.3EPSS 0.93%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 16 days later
· 16 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.93% · top 39% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
- affected < 2.3.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPImatrix-sydentGHSA-mh74-4m5g-fcjx (opens in a new tab)
References (4)
- https://pypi.org/project/matrix-sydent/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/matrix-org/sydent/releases/tag/v2.3.0 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjx (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-mh74-4m5g-fcjx (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-29432)Record last updated .