VDB
PYSEC-2020-238
PYSEC-2020-238
PUBLISHED
CVSS 8.5 HIGH
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.
Risk Scores
CVSS v4.0
8.5
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | matrix-synapse | 0, 0.33.5, 0.33.5.1 |
Timeline
- Oct 19, 2020 CVE Published
- Nov 8, 2023 CVE Updated