{"id":"CVE-2026-12417","state":"PUBLISHED","title":"SignUp & SignIn <= 1.0.0 - Unauthenticated Privilege Escalation via Weak Password Reset Validation via 'reset_activation_code' Leading to Account Takeover","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 — registered via `wp_ajax_nopriv_pravel_change_password` and therefore accessible to unauthenticated users — 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.","publishedAt":"2026-06-24T05:33:29.852Z","updatedAt":"2026-06-29T19:14:44.447Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Wordfence"},"assigner":"Wordfence","products":["pravel SignUp & SignIn"],"affected":[{"vendor":"pravel","product":"SignUp & SignIn","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.0","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/c0a617fc-da3d-4828-b027-44093dd11769?source=cve","https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L229","https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L222","https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L38"],"weaknesses":["CWE-640"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/12xxx/CVE-2026-12417.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12417","state":"PUBLISHED","datePublished":"2026-06-24T05:33:29.852Z","dateUpdated":"2026-06-29T19:14:44.447Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-06-16T16:02:39.731Z"},"containers":{"cna":{"title":"SignUp & SignIn <= 1.0.0 - Unauthenticated Privilege Escalation via Weak Password Reset Validation via 'reset_activation_code' Leading to Account Takeover","descriptions":[{"lang":"en","value":"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 — registered via `wp_ajax_nopriv_pravel_change_password` and therefore accessible to unauthenticated users — 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."}],"affected":[{"vendor":"pravel","product":"SignUp & SignIn","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.0","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c0a617fc-da3d-4828-b027-44093dd11769?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L229"},{"url":"https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L222"},{"url":"https://plugins.trac.wordpress.org/browser/signup-signin/tags/1.0.0/lib/function.php#L38"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-640","lang":"en","description":"CWE-640 Weak Password Recovery Mechanism for Forgotten Password","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-06-24T05:33:29.852Z"},"credits":[{"lang":"en","type":"finder","value":"Alyudin Nafiie"}],"timeline":[{"time":"2026-06-23T16:37:27.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-29T19:14:09.849697Z","id":"CVE-2026-12417","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-29T19:14:44.447Z"}}]}}}