Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Synapse | < 1.27.0 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1dPatchThird Party Advisory
- https://github.com/matrix-org/synapse/pull/9200PatchThird Party Advisory
- https://github.com/matrix-org/synapse/releases/tag/v1.27.0Third Party Advisory
- https://github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1dPatchThird Party Advisory
- https://github.com/matrix-org/synapse/pull/9200PatchThird Party Advisory
- https://github.com/matrix-org/synapse/releases/tag/v1.27.0Third Party Advisory
- https://github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-21332?
CVE-2021-21332 is a vulnerability with a CVSS score of 6.9 (MEDIUM). 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 pa...
How severe is CVE-2021-21332?
CVE-2021-21332 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21332?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Synapse, Fedoraproject Fedora.