ByteOS Network

NVD Vulnerability Details :

CVE-2020-26891

Analyzed

Source-cve@mitre.org

Published At-19 Oct, 2020 | 17:15

Updated At-26 Oct, 2020 | 21:30

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Primary	3.1	6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary	2.0	4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N

CPE Matches

The Matrix.org Foundation

>>synapse>>Versions before 1.21.0(exclusive)

cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-79	Primary	nvd@nist.gov

References

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

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History