{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-54888",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-07-31T17:23:33.476Z",
        "datePublished": "2025-08-09T01:31:53.319Z",
        "dateUpdated": "2026-02-04T22:13:48.899Z"
    },
    "containers": {
        "cna": {
            "title": "@fedify/fedify: Improper Authentication and Incorrect Authorization",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-6jcc-xgcr-q3h4"
                },
                {
                    "name": "https://github.com/fedify-dev/fedify/commit/14a2f8c6d2c3cbc00c3170a86ad3b7b8555c6847",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/fedify-dev/fedify/commit/14a2f8c6d2c3cbc00c3170a86ad3b7b8555c6847"
                }
            ],
            "affected": [
                {
                    "vendor": "fedify-dev",
                    "product": "fedify",
                    "versions": [
                        {
                            "version": "< 1.3.20",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.4.0-dev.585, < 1.4.13",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.5.0-dev.636, < 1.5.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.6.0-dev.754, < 1.6.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.7.0-pr.251.885, < 1.7.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.8.0-dev.909, < 1.8.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-04T22:13:48.899Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. In versions below 1.3.20, 1.4.0-dev.585 through 1.4.12, 1.5.0-dev.636 through 1.5.4, 1.6.0-dev.754 through 1.6.7, 1.7.0-pr.251.885 through 1.7.8 and 1.8.0-dev.909 through 1.8.4, an authentication bypass vulnerability allows any unauthenticated attacker to impersonate any ActivityPub actor by sending forged activities signed with their own keys. Activities are processed before verifying the signing key belongs to the claimed actor, enabling complete actor impersonation across all Fedify instances. This is fixed in versions 1.3.20, 1.4.13, 1.5.5, 1.6.8, 1.7.9 and 1.8.5."
                }
            ],
            "source": {
                "advisory": "GHSA-6jcc-xgcr-q3h4",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-08-11T13:48:34.676198Z",
                                "id": "CVE-2025-54888",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2025-08-11T13:48:53.546Z"
                }
            }
        ]
    }
}