{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-39191",
        "STATE": "PUBLIC",
        "TITLE": "URL Redirection to Untrusted Site ('Open Redirect') in mod_auth_openidc"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "mod_auth_openidc",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "<=2.4.9.3"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "zmartzone"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2",
                "refsource": "CONFIRM",
                "url": "https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2"
            },
            {
                "name": "https://github.com/zmartzone/mod_auth_openidc/issues/672",
                "refsource": "MISC",
                "url": "https://github.com/zmartzone/mod_auth_openidc/issues/672"
            },
            {
                "name": "https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d",
                "refsource": "MISC",
                "url": "https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d"
            },
            {
                "name": "https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4",
                "refsource": "MISC",
                "url": "https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-8d9aca2ded",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-814ee0c43b",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20230718 [SECURITY] [DLA 3499-1] libapache2-mod-auth-openidc security update",
                "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-2pgf-8h6h-gqg2",
        "discovery": "UNKNOWN"
    }
}