CVE-2021-21332
Published: 26 March 2021
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
matrix-synapse Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(1.27.0-1)
|
| lunar |
Not vulnerable
(1.27.0-1)
|
|
| impish |
Not vulnerable
(1.27.0-1)
|
|
| bionic |
Needs triage
|
|
| focal |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Not vulnerable
(1.27.0-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(1.27.0)
|
|
| xenial |
Does not exist
|
|
| kinetic |
Not vulnerable
(1.27.0-1)
|
|
| mantic |
Not vulnerable
(1.27.0-1)
|
|
|
Patches: upstream: https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.2 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N |