CVE-2021-29432: Malicious users could control the content of invitation emails
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.
Other sources
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.
Affected Software
Remediation
Event History
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).