CVE-2026-77770

The miniOrange 2FA WordPress plugin deletes site options whose names are taken directly from unauthenticated request input without first validating a transaction, a missing-authorization flaw (CWE-862). Any unauthenticated visitor can therefore send a crafted request that deletes arbitrary WordPress options on a vulnerable site. By deleting key options, an attacker can lock every administrator out of the dashboard or deactivate the miniOrange 2FA plugin(s) on the site, defeating two-factor enforcement; this is reflected in the critical CVSS 3.1 score of 10.0 with scope-changed, high integrity and availability impact. All WordPress sites running an affected version — before 6.3.1 or before 19.3 depending on the distribution's version line — are affected. There is no known public proof-of-concept, the flaw is not in CISA KEV, and no in-the-wild exploitation has been reported.

What to do: Update the miniOrange 2FA plugin urgently: install version 6.3.1 or later (or version 19.3 or later on the other distribution's version line, per the branch you run). Because the flaw is exploitable by any unauthenticated visitor and can fully lock administrators out, if you cannot patch immediately consider temporarily deactivating the plugin or blocking unauthenticated requests that trigger option deletion at your WAF. After patching, verify that two-factor enforcement is active and that important site options (including administrator and 2FA settings) were not deleted.