Summary
CVE-2026-16036 is an authentication bypass (CWE-287, Improper Authentication) vulnerability in the miniOrange 2FA WordPress plugin in all versions before 6.2.7. The plugin fails to properly bind a second authentication factor to the target account during the pre-login challenge, allowing an attacker who knows a victim’s password to reassign that user’s second factor to an attacker-controlled device and bypass two-factor authentication. It carries a High severity CVSS v3.1 base score of 7.5.
Technical details
- Root cause: The plugin does not correctly bind the second authentication factor to the target account during the second-factor setup/challenge, permitting the factor to be rebound.
- Trigger conditions: An attacker must already know the victim’s account password. Using that password, the attacker reassigns the victim’s second factor to a device they control.
- Attack vector: Network (remote, over the login/second-factor challenge flow).
- Impact: Bypass of the two-factor authentication requirement, resulting in account takeover — including administrator accounts.
Affected software
- miniOrange 2FA (WordPress plugin) — all versions before 6.2.7.
Severity
- CVSS v3.1 base score: 7.5 (High)
- Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Mitigation and recommended actions
- Immediate: Update the miniOrange 2FA plugin (
miniorange-2-factor-authentication) to version 6.2.7 or later, which addresses the issue. - If no patch can be applied yet: Restrict access to WordPress login and administrative endpoints (for example, by IP allow-listing or a web application firewall), enforce password resets for potentially exposed accounts, and monitor for unexpected changes to users’ second-factor enrollments.
How IONIX identifies potentially affected assets
IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.
- Raw response body:
/wp-content/plugins/miniorange-2-factor-authentication/

