CVE-2026-0551
Authenticated PHP object injection in PPWP WordPress plugin via deserialized 'post_protection_roles'.
Is CVE-2026-0551 being exploited?
Not confirmed. CVE-2026-0551 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 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2026-0551?
CVE-2026-0551 is rated High with a CVSS score of 8.8. 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-2026-0551?
Not known from our data. No patch reference has been recorded for CVE-2026-0551, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-0551 affect?
CVE-2026-0551 affects PPWP – Password Protect Pages WordPress plugin (<= 1.9.18), WordPress sites running the vulnerable PPWP plugin, Sites with additional plugins/themes that provide POP chains. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-0551?
Disable/remove PPWP; restrict Contributor roles; audit plugins/themes for POP chains; apply vendor patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated Contributor+ can inject PHP objects; with a separate plugin/theme POP chain may enable file deletion, data disclosure, or RCE.
Patch when possible
- affected<= 1.9.18
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.