{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-21238",
        "STATE": "PUBLIC",
        "TITLE": "SAML XML Signature wrapping"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "pysaml2",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 6.5.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "IdentityPython"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. All users of pysaml2 that need to validate signed SAML documents are impacted. The vulnerability is a variant of XML Signature wrapping because it did not validate the SAML document against an XML schema. This allowed invalid XML documents to be processed and such a document can trick pysaml2 with a wrapped signature. This is fixed in PySAML2 6.5.0."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-347 Improper Verification of Cryptographic Signature"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://pypi.org/project/pysaml2",
                "refsource": "MISC",
                "url": "https://pypi.org/project/pysaml2"
            },
            {
                "name": "https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0",
                "refsource": "MISC",
                "url": "https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0"
            },
            {
                "name": "https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9",
                "refsource": "CONFIRM",
                "url": "https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9"
            },
            {
                "name": "https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14",
                "refsource": "MISC",
                "url": "https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-f4g9-h89h-jgv9",
        "discovery": "UNKNOWN"
    }
}