CVE-2026-104759
OIDC nonce replay lets attackers reuse id_tokens to authenticate as any WordPress user.
Is CVE-2026-104759 being exploited?
Not confirmed. CVE-2026-104759 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 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-104759?
CVE-2026-104759 is rated High with a CVSS score of 8.1. 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-2026-104759?
Yes. A fix has been recorded for CVE-2026-104759. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-104759 affect?
CVE-2026-104759 affects WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin <= 44.1 (when use_id_token_parser_v2 enabled). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-104759?
Update plugin to 45.0+ or disable use_id_token_parser_v2 until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authentication bypass: replayed OIDC id_token allows attacker to log in as any user (including admins), enabling full site takeover.
Immediate action required
- affected<= 44.1
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.