Grav vulnerable to Denial of Service via Improper Input Handling in ‘Supported’ Parameter_CVE-2025-66305

{
    "lastseen": "",
    "description": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Denial of Service (DoS) vulnerability was identified in the \"Languages\" submenu of the Grav admin configuration panel (/admin/config/system). Specifically, the Supported parameter fails to properly validate user input. If a malformed value is inserted\u2014such as a single forward slash (/) or an XSS test string\u2014it causes a fatal regular expression parsing error on the server. This leads to application-wide failure due to the use of the preg_match() function with an improperly constructed regular expression, resulting in an error. Once triggered, the site becomes completely unavailable to all users. This vulnerability is fixed in 1.8.0-beta.27.",
    "published": "2025-12-01T21:43:29.725Z",
    "modified": "2025-12-01T21:43:29.725Z",
    "type": "cve",
    "title": "Grav vulnerable to Denial of Service via Improper Input Handling in 'Supported' Parameter",
    "source": "GitHub_M",
    "references": "https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6\nhttps://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197ee",
    "id": "CVE-2025-66305",
    "bulletinFamily": "",
    "cwe": [
        "CWE-248"
    ],
    "cvelist": null,
    "sourceData": "getgrav grav < 1.8.0-beta.27",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "grav",
    "version": "< 1.8.0-beta.27",
    "vendor": "getgrav",
    "ai_description": "",
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    "ai_product": "",
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    "ai_score": 0
}