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cvelistGitHub_MCVELIST:CVE-2021-39185
HistorySep 01, 2021 - 7:25 p.m.

CVE-2021-39185 Default CORS config allows any origin with credentials

2021-09-0119:25:09
CWE-346
GitHub_M
www.cve.org

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

9.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

51.2%

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.

CNA Affected

[
  {
    "product": "http4s",
    "vendor": "http4s",
    "versions": [
      {
        "status": "affected",
        "version": "< 0.21.27"
      },
      {
        "status": "affected",
        "version": ">= 0.22.0, < 0.22.3"
      },
      {
        "status": "affected",
        "version": ">= 0.23.0, < 0.23.2"
      },
      {
        "status": "affected",
        "version": ">= 1.0.0-M1, <= 1.0.0-M24"
      }
    ]
  }
]

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

9.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

51.2%

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