{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12949","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","state":"PUBLISHED","assignerShortName":"Wordfence","dateReserved":"2026-06-22T20:38:06.650Z","datePublished":"2026-08-14T05:30:43.982Z","dateUpdated":"2026-08-14T14:59:09.168Z"},"containers":{"cna":{"providerMetadata":{"orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","shortName":"Wordfence","dateUpdated":"2026-08-14T05:30:43.982Z"},"affected":[{"vendor":"Wishlist Member","product":"Wishlist Member","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.34.1","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"The Wishlist Member plugin for WordPress is vulnerable to Account Takeover via Insufficient Verification of Data Authenticity in versions up to and including 3.34.1. This is due to the wpm_register() function validating the registration cookie only against the GET reg parameter while accepting the POST mergewith and POST wpm_id parameters without verifying that the mergewith user ID references a temporary or incomplete registrant that is bound to the current registration transaction. This makes it possible for unauthenticated attackers to take over any existing WordPress account — including administrator accounts — by supplying an arbitrary user's numeric ID as the mergewith value, which causes wp_update_user() to overwrite the target account's username (additionally written via a direct $wpdb UPDATE), password, email address, first name, and last name with attacker-controlled values, while WordPress password and email change notification emails are explicitly suppressed. When wpm_id references a non-existent membership level, no role key is added to the update payload, causing wp_update_user() to preserve the target user's existing role — including administrator — making full privilege escalation a direct consequence of the takeover."}],"title":"Wishlist Member X <= 3.34.1 - Unauthenticated Account Takeover via 'mergewith' Parameter","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/84afe5a7-1bf4-4b83-bf77-efbb003a30cd?source=cve"},{"url":"https://wishlistmember.com/"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-640 Weak Password Recovery Mechanism for Forgotten Password","cweId":"CWE-640","type":"CWE"}]}],"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"}}],"credits":[{"lang":"en","type":"finder","value":"bashu"}],"timeline":[{"time":"2026-06-22T20:53:51.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-08-13T17:19:58.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-14T14:58:49.692800Z","id":"CVE-2026-12949","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-14T14:59:09.168Z"}}]}}