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
AI Score
Confidence
High
EPSS
Percentile
53.0%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.13-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.14-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.15-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.16-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.17-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.18-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.19-community | noarch | synapse | < 1.21.1-r0 | UNKNOWN |
Alpine | 3.20-community | noarch | synapse | < 1.21.1-r0 | 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
AI Score
Confidence
High
EPSS
Percentile
53.0%