CVE-2026-12255
Auth bypass in MainWP Child plugin allows unauthenticated account takeover.
Is CVE-2026-12255 being exploited?
Not confirmed. CVE-2026-12255 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 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-12255?
CVE-2026-12255 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-2026-12255?
Yes. A fix has been recorded for CVE-2026-12255. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-12255 affect?
CVE-2026-12255 affects MainWP Child WordPress plugin < 6.1.2, WordPress sites using MainWP Child, Sites managed via MainWP. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-12255?
Upgrade MainWP Child to 6.1.2+ immediately; restrict access to MainWP endpoints if unpatchable.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can obtain a valid session as any named user (including admin), enabling site takeover, data access, and code/plugin modification.
Immediate action required
- affected< 6.1.2
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.