SignUp & SignIn <= 1.0.0 - Unauthenticated Privilege Escalation via Weak Password Reset Validation via 'reset_activation_code' Leading to Account Takeover_CVE-2026-12417

{
    "lastseen": "",
    "description": "The SignUp & SignIn plugin for WordPress is vulnerable to Authentication Bypass via Weak Password Reset Validation leading to Account Takeover in versions up to, and including, 1.0.0. This is due to the `pravel_change_password()` AJAX handler \u2014 registered via `wp_ajax_nopriv_pravel_change_password` and therefore accessible to unauthenticated users \u2014 performing no nonce verification, no capability check, and only a loose equality check between an attacker-supplied `reset_activation_code` POST parameter and the target user's `forgot_email` user meta value; when a user has never initiated a password reset, `get_user_meta()` returns an empty string that trivially satisfies this check against an omitted or empty attacker-supplied code. This makes it possible for unauthenticated attackers to change the password of any WordPress user, including administrators, by sending a crafted POST request to `admin-ajax.php` with `action=pravel_change_password`, `reset_user_id` set to the target account's user ID, and `new_password_custom` set to an attacker-chosen password. Successful exploitation allows the attacker to authenticate with the newly set password and fully take over the targeted account, achieving administrator-level privilege escalation on the affected site.",
    "published": "2026-06-24T05:33:29.852Z",
    "modified": "2026-06-24T05:33:29.852Z",
    "type": "cve",
    "title": "SignUp & SignIn <= 1.0.0 - Unauthenticated Privilege Escalation via Weak Password Reset Validation via 'reset_activation_code' Leading to Account Takeover",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c0a617fc-da3d-4828-b027-44093dd11769?source=cve\nhttps://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L229\nhttps://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L222\nhttps://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L38",
    "id": "CVE-2026-12417",
    "bulletinFamily": "",
    "cwe": [
        "CWE-640"
    ],
    "cvelist": null,
    "sourceData": "pravel SignUp & SignIn 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "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": "SignUp & SignIn",
    "version": "0",
    "vendor": "pravel",
    "ai_description": "Unauthenticated attackers can change the password of any WordPress user, including administrators, due to weak password reset validation in the SignUp & SignIn plugin, allowing for account takeover and administrator-level privilege escalation.",
    "ai_severity": "Critical",
    "ai_vendor": "pravel",
    "ai_product": "SignUp & SignIn",
    "ai_version": "1.0.0",
    "ai_score": 9.8
}