CVE-2021-39185 Information

Description

Http4s is a minimal idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior 0.22.0 through 0.22.2 0.23.0 0.23.1 and 1.0.0-M1 through 1.0.0-M24 the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27 0.22.3 0.23.2 and 1.0.0-M25. The original CORS implementation and CORSConfig are deprecated. See the GitHub GHSA for more information including code examples and workarounds.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Reference

https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6 https://github.com/http4s/http4s/releases/tag/v0.23.2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

9.1