cbcvebase.
CVE-2021-21332
published 2021-03-26

CVE-2021-21332: Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP…

PriorityP336high8.2CVSS 3.1
AVNACLPRNUIRSCCHILAN
EPSS
1.22%
65.3th percentile
Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the password reset endpoint served via Synapse was vulnerable to cross-site scripting (XSS) attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities, and access to other resources served on the same domain or parent domains. This is fixed in version 1.27.0.

Affected

4 ranges
VendorProductVersion rangeFixed in
debianmatrix-synapse< matrix-synapse 1.27.0-1 (forky)matrix-synapse 1.27.0-1 (forky)
fedoraprojectfedora
matrix-orgsynapse< 1.27.01.27.0
matrixsynapse< 1.27.01.27.0

CVSS provenance

nvdv3.18.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
osv8.2HIGH
vendor_debian6.9MEDIUM
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