CVE-2026-93757
Full vulnerability record from the local CVENow database.
Description
The Wild Apricot Login plugin for WordPress is vulnerable to Authentication Bypass via SSO Email-Collision Account Binding in all versions up to, and including, 1.0.18. When no WildApricot contact-ID mapping is found for an incoming SSO login, the plugin falls back to a network-global `get_user_by('email', ...)` lookup in `Module.php` to resolve a WordPress user, then `UserSynchronizer::syncWaContact()` binds and `Controller::login()` issues a session cookie via `wp_set_auth_cookie()` for that resolved user — both guarded only by `is_super_admin()` — without ever requiring proof of ownership of the matched WordPress account such as a password, local account-linking confirmation, inbox verification, or administrator approval. This makes it possible for attackers with custom-level WildApricot membership access to authenticate as an existing WordPress subsite administrator on a path-based Multisite network, obtaining a valid network-global authentication cookie for the victim without their credentials. Exploitation requires that the attacker control a WildApricot contact whose email address matches the target WordPress administrator's email — achievable via a public zero-fee membership application on the connected WildApricot organization — and that they complete the SSO flow on any subsite where Wild Apricot Login is active; because WordPress user identities and authentication cookies are network-global, the cookie issued on that subsite is equally valid on any other subsite where the victim user holds an administrator role.
View original CVE JSON
{
"id": "CVE-2026-93757",
"sourceIdentifier": "[email protected]",
"published": "2026-10-29T04:18:43.763",
"lastModified": "2026-10-29T14:56:26.107",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The Wild Apricot Login plugin for WordPress is vulnerable to Authentication Bypass via SSO Email-Collision Account Binding in all versions up to, and including, 1.0.18. When no WildApricot contact-ID mapping is found for an incoming SSO login, the plugin falls back to a network-global `get_user_by('email', ...)` lookup in `Module.php` to resolve a WordPress user, then `UserSynchronizer::syncWaContact()` binds and `Controller::login()` issues a session cookie via `wp_set_auth_cookie()` for that resolved user — both guarded only by `is_super_admin()` — without ever requiring proof of ownership of the matched WordPress account such as a password, local account-linking confirmation, inbox verification, or administrator approval. This makes it possible for attackers with custom-level WildApricot membership access to authenticate as an existing WordPress subsite administrator on a path-based Multisite network, obtaining a valid network-global authentication cookie for the victim without their credentials. Exploitation requires that the attacker control a WildApricot contact whose email address matches the target WordPress administrator's email — achievable via a public zero-fee membership application on the connected WildApricot organization — and that they complete the SSO flow on any subsite where Wild Apricot Login is active; because WordPress user identities and authentication cookies are network-global, the cookie issued on that subsite is equally valid on any other subsite where the victim user holds an administrator role."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "wild-apricot",
"product": "Wild Apricot Login",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThanOrEqual": "1.0.18",
"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.6,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-29T10:34:17.390489Z",
"id": "CVE-2026-93757",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-287"
}
]
}
],
"references": [
{
"url": "https://plugins.trac.wordpress.org/browser/wild-apricot-login/tags/1.0.18/Modules/Authorization/WaLogin/Controller.php#L347",
"source": "[email protected]"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wild-apricot-login/tags/1.0.18/Modules/Core/Module.php#L112",
"source": "[email protected]"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wild-apricot-login/tags/1.0.18/Modules/Core/Module.php#L159",
"source": "[email protected]"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wild-apricot-login/tags/1.0.18/Modules/Core/WaApi/Client.php#L22",
"source": "[email protected]"
},
{
"url": "https://plugins.trac.wordpress.org/browser/wild-apricot-login/tags/1.0.18/Modules/Synchronization/UserSynchronizer.php#L36",
"source": "[email protected]"
},
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9adbe55e-f1a1-4fa8-b28d-539d90d81c68?source=cve",
"source": "[email protected]"
}
]
}