CVE-2020-26891
N/A
N/A
Summary
AuthRestServlet in Matrix Synapse before 1.21.0 is vulnerable to XSS due to unsafe interpolation of the session GET parameter. This allows a remote attacker to execute an XSS attack on the domain Synapse is hosted on, by supplying the victim user with a malicious URL to the /_matrix/client/r0/auth//fallback/web or /_matrix/client/unstable/auth//fallback/web Synapse endpoints.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | n/a | n/a | affected |
Weaknesses
- n/a
ADP Enrichment
CVE Program Container
Additional References
- https://github.com/matrix-org/synapse/pull/8444
- https://matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory
- https://github.com/matrix-org/synapse/releases/tag/v1.21.2
- https://github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq
References
- https://github.com/matrix-org/synapse/pull/8444
- https://matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory
- https://github.com/matrix-org/synapse/releases/tag/v1.21.2
- https://github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq
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