CVE-2020-26891: Cross-site scripting (XSS) vulnerability in the fallback authentication endpoint
(updated )
The fallback authentication 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.
References
- github.com/advisories/GHSA-3x8c-fmpc-5rmq
- github.com/matrix-org/synapse
- github.com/matrix-org/synapse/pull/8444
- github.com/matrix-org/synapse/releases
- github.com/matrix-org/synapse/releases/tag/v1.21.2
- github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2020-238.yaml
- matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory
- nvd.nist.gov/vuln/detail/CVE-2020-26891
Code Behaviors & Features
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