CVE-2026-15826
Auth bypass in User Profile Builder plugin allows admin (user ID 1) takeover.
Is CVE-2026-15826 being exploited?
Not confirmed. CVE-2026-15826 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 3.9% probability of exploitation in the next 30 days.
How severe is CVE-2026-15826?
CVE-2026-15826 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-15826?
Yes. A fix has been recorded for CVE-2026-15826. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-15826 affect?
CVE-2026-15826 affects WordPress sites with User Profile Builder plugin ≤ 3.16.4, Sites where admin is user ID 1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-15826?
Update plugin to patched release or remove plugin; rotate admin credentials and audit logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can authenticate as user ID 1 (Administrator), achieving full administrative takeover of affected WordPress sites.
Immediate action required
- affected<= 3.16.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.