{
    "id": "CVE-2026-61511",
    "published": "2026-07-27 14:16:59",
    "last_modified": "2026-08-07 06:16:56",
    "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-95",
    "description": "vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method within the template runtime that allows unauthenticated remote attackers to execute arbitrary PHP code by supplying crafted input through the pagenav[pagenumber] parameter. Attackers can exploit the insufficiently restrictive regex filter by using phpfuck-style encoding with permitted characters to inject and execute arbitrary PHP code via the unauthenticated ajax/render template route without any authentication.",
    "epss_score": "0.05607",
    "epss_percentile": "0.92695",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-06 18:17:54",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509358-security-patch-released-for-vbulletin-6-2-1-6-2-0-and-6-1-6",
        "https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509404-vbulletin-6-2-2-is-available",
        "https://karmainsecurity.com/KIS-2026-13",
        "https://ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce/",
        "https://www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-template-runtime-php",
        "http://seclists.org/fulldisclosure/2026/Aug/29"
    ]
}