Phar Deserialization leading to Arbitrary File Deletion in my little forum_CVE-2026-25923

{
    "lastseen": "",
    "description": "my little forum is a PHP and MySQL based internet forum that displays the messages in classical threaded view. Prior to 20260208.1, the application fails to filter the phar:// protocol in URL validation, allowing attackers to upload a malicious Phar Polyglot file (disguised as JPEG) via the image upload feature, trigger Phar deserialization through BBCode [img] tag processing, and exploit Smarty 4.1.0 POP chain to achieve arbitrary file deletion. This vulnerability is fixed in 20260208.1.",
    "published": "2026-02-09T21:56:02.862Z",
    "modified": "2026-02-09T21:56:02.862Z",
    "type": "cve",
    "title": "Phar Deserialization leading to Arbitrary File Deletion in my little forum",
    "source": "GitHub_M",
    "references": "https://github.com/My-Little-Forum/mylittleforum/security/advisories/GHSA-wr9p-3c3g-78fw\nhttps://github.com/My-Little-Forum/mylittleforum/releases/tag/20260208.1",
    "id": "CVE-2026-25923",
    "bulletinFamily": "",
    "cwe": [
        "CWE-434",
        "CWE-502"
    ],
    "cvelist": null,
    "sourceData": "My-Little-Forum mylittleforum < 20260208.1",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "mylittleforum",
    "version": "< 20260208.1",
    "vendor": "My-Little-Forum",
    "ai_description": "Phar Deserialization vulnerability allowing arbitrary file deletion",
    "ai_severity": "High",
    "ai_vendor": "My-Little-Forum",
    "ai_product": "mylittleforum",
    "ai_version": "< 20260208.1",
    "ai_score": 8.7
}