CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
53.0%
Severity: High
Date : 2020-11-03
CVE-ID : CVE-2020-26891
Package : matrix-synapse
Type : cross-site scripting
Remote : Yes
Link : https://security.archlinux.org/AVG-1252
The package matrix-synapse before version 1.21.0-1 is vulnerable to
cross-site scripting.
Upgrade to 1.21.0-1.
The problem has been fixed upstream in version 1.21.0.
None.
A security issue has been found in matrix-synapse before 1.21.0, where
HTML pages served via Synapse were vulnerable to cross-site scripting
(XSS) attacks.
A remote attacker might be able to spoof content and execute code via a
cross-site scripting attack.
https://github.com/matrix-org/synapse/releases/tag/v1.21.2
https://github.com/matrix-org/synapse/pull/8444
https://security.archlinux.org/CVE-2020-26891
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ArchLinux | any | any | matrix-synapse | < 1.21.0-1 | UNKNOWN |
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
53.0%