CVE-2021-29432: Malicious users could control the content of invitation emails
First published: Thu Apr 15 2021(Updated: )
### Impact 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. ### Patches Fixed in 4469d1d, 6b405a8, 65a6e91. Note that these patches include changes to the *default* email templates. If these templates have been locally modified, they must also be updated. ### For more information If you have any questions or comments about this advisory, email us at security@matrix.org.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Matrix Sydent | <2.3.0 | |
| pip/matrix-sydent | <2.3.0 | 2.3.0 |
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Reference Links
- https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42
- https://github.com/matrix-org/sydent/releases/tag/v2.3.0
- https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjx
- https://pypi.org/project/matrix-sydent/
- https://nvd.nist.gov/vuln/detail/CVE-2021-29432
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-23.yaml
- https://pypi.org/project/matrix-sydent
- https://github.com/advisories/GHSA-mh74-4m5g-fcjx (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-29432.
What is Sydent?
Sydent is a reference matrix identity server.
How could a malicious user abuse Sydent?
A malicious user could abuse Sydent to send out arbitrary emails from the Sydent email address.
What could a malicious user do with this vulnerability?
A malicious user could construct plausible phishing emails using the vulnerability.
Has this vulnerability been fixed?
Yes, this vulnerability has been fixed in version 2.3.0 of Sydent (commit 4469d1d).
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