Description
The openUrl function in @a2ui/web_core passes an agent-controlled URL directly to window.open() without validating the URI scheme. A malicious agent can supply a javascript: URI as the url argument of a Button component's functionCall action. When the user clicks the rendered button, arbitrary JavaScript executes in the victim application's browser origin, constituting a stored/reflected XSS with Critical severity. No non-default configuration is required; the Basic Catalog is enabled by default.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
Passive
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
Low
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
E
Unchanged
Affected products
- Google / @a2ui/web_core0.9.0 – 0.9.0
- Google / @a2ui/web_core0.9.1-alpha.0 – 0.9.1-alpha.0
- Google / @a2ui/web_core0.9.1-alpha.1 – 0.9.1-alpha.1
- Google / @a2ui/web_core0.9.1-alpha.2 – 0.9.1-alpha.2
- Google / @a2ui/web_core0.9.1-alpha.3 – 0.9.1-alpha.3
- Google / @a2ui/web_core0.9.1-alpha.4 – 0.9.1-alpha.4
- Google / @a2ui/web_core0.9.1-alpha.5 – 0.9.1-alpha.5
- Google / @a2ui/web_core0.9.1 – 0.9.1
- Google / @a2ui/web_core0.9.2 – 0.9.2
- Google / @a2ui/web_core0.10.0 – 0.10.0
- Google / @a2ui/web_core0.10.1 – 0.10.1
References
Updated 20m ago · 8 sources