CVE-2026-4003
Privilege escalation in WP Users Manager PN plugin via unauthenticated meta update.
Is CVE-2026-4003 being exploited?
Not confirmed. CVE-2026-4003 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 0.89% probability of exploitation in the next 30 days.
How severe is CVE-2026-4003?
CVE-2026-4003 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-2026-4003?
Yes. A fix has been recorded for CVE-2026-4003. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-4003 affect?
CVE-2026-4003 affects WordPress site, Users Manager PN plugin <= 1.1.15. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-4003?
Patch to latest (>=1.1.16); rotate secrets; audit user_meta changes.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can update arbitrary user meta (e.g., secret_token) for any account, enabling takeover.
Immediate action required
- affected<= 1.1.15
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.