{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23891",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-01-16T21:02:02.902Z",
        "datePublished": "2026-04-13T16:52:16.448Z",
        "dateUpdated": "2026-04-14T16:29:24.311Z"
    },
    "containers": {
        "cna": {
            "title": "Decidim has a Cross-site scripting (XSS) vulnerability via user name field",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "LOW",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g"
                },
                {
                    "name": "https://github.com/decidim/decidim/releases/tag/v0.30.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/decidim/decidim/releases/tag/v0.30.5"
                },
                {
                    "name": "https://github.com/decidim/decidim/releases/tag/v0.31.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/decidim/decidim/releases/tag/v0.31.1"
                }
            ],
            "affected": [
                {
                    "vendor": "decidim",
                    "product": "decidim",
                    "versions": [
                        {
                            "version": ">= 0.31.0.rc1, < 0.31.1",
                            "status": "affected"
                        },
                        {
                            "version": "< 0.30.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-13T16:52:16.448Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Decidim is a participatory democracy framework. In versions below 0.30.5 and 0.31.0.rc1 through 0.31.0, a stored code execution vulnerability in the user name field allows a low-privileged attacker to execute arbitrary code in the context of any user who passively visits a comment page, resulting in high confidentiality and integrity impact across security boundaries. This issue has been fixed in versions 0.30.5 and 0.31.1."
                }
            ],
            "source": {
                "advisory": "GHSA-fc46-r95f-hq7g",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-14T15:23:47.437196Z",
                                "id": "CVE-2026-23891",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-14T16:29:24.311Z"
                }
            }
        ]
    }
}