6.1

CVE-2020-26891

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Matrix ≫ Synapse Version < 1.21.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.91% 0.771
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvd@nist.gov 4.3 8.6 2.9
AV:N/AC:M/Au:N/C:N/I:P/A:N
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://github.com/matrix-org/synapse/pull/8444
Patch
Third Party Advisory
Issue Tracking
https://github.com/matrix-org/synapse/releases/tag/v1.21.2
Third Party Advisory
Release Notes
https://github.com/matrix-org/synapse/security/advisories/GHSA-3x8c-fmpc-5rmq
Patch
Third Party Advisory
https://matrix.org/blog/2020/10/15/synapse-1-21-2-released-and-security-advisory
Vendor Advisory
Release Notes