CVE-2026-12949 (GCVE-0-2026-12949)

Vulnerability from cvelistv5 – Published: 2026-08-14 05:30 – Updated: 2026-08-14 14:59
VLAI
Title
Wishlist Member X <= 3.34.1 - Unauthenticated Account Takeover via 'mergewith' Parameter
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 14:58 UTC
CWE
  • CWE-640 - Weak Password Recovery Mechanism for Forgotten Password
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2401 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Wishlist Member Wishlist Member Affected: 0 , ≤ 3.34.1 (semver)
guessed Create a notification for this product.
Credits
bashu
Show details on NVD website
To clipboard 

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