CVE-2021-29432
Malicious users could control the content of invitation emails
MEDIUM
5.7
CVSS Score
Published: April 15, 2021 at 08:45 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
2 products affected across 2 vendorsSydentSydent
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Severity
MEDIUM5.7
Exploit prediction
EPSS 0.9%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.3.0
Affected range stops below 2.3.0, so it looks safe — our inference, not a vendor statement
60%
v < 2.3.0
Affected range stops below 2.3.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/matrix-org/sydent/commit/4469d1d42b2b1612b70638224c07e19623039c42x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/matrix-org/sydent/releases/tag/v2.3.0x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/matrix-org/sydent/security/advisories/GHSA-mh74-4m5g-fcjxx_refsource_MISCProductThird Party Advisory
Source: [email protected]
https://pypi.org/project/matrix-sydent/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo
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