LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template prints a collection (Array / Dictionary) via `#(value)`. This can result in XSS, allowing potentially untrusted input to be rendered unescaped.
Version 1.14.2 fixes the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Vapor Leafkit
cpe:2.3:a:vapor:leafkit:*:*:*:*:*:*:*:*
|
— |
1.14.2
|
References 3
https://github.com/vapor/leaf-kit/commit/6044b844caa858a0c5f2505ac166f5a057c990…
security-advisories@github.com
https://github.com/vapor/leaf-kit/releases/tag/1.14.2
security-advisories@github.com
https://github.com/vapor/leaf-kit/security/advisories/GHSA-6jj5-j4j8-8473
security-advisories@github.com