{
    "id": "CVE-2023-49105",
    "published": "2023-11-21 22:15:08",
    "last_modified": "2026-08-28 12:21:09",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-287",
    "description": "An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.",
    "epss_score": "0.42919",
    "epss_percentile": "0.98676",
    "kev": 1,
    "kev_due": "2026-08-30",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:07:35",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-08-30."
    },
    "products": [
        {
            "vendor": "owncloud",
            "product": "owncloud_server"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2023-49105",
        "date_added": "2026-08-27",
        "due_date": "2026-08-30",
        "vendor": "ownCloud",
        "product": "ownCloud",
        "name": "ownCloud Improper Authentication Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/",
        "https://owncloud.org/security",
        "https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/",
        "https://owncloud.org/security",
        "https://hunt.io/blog/chinese-speaking-operator-philippine-nuclear-naval-contractor",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-49105"
    ]
}