Vulnerability in Fluent Booking

CVE-2026-9576

The Fluent Booking WordPress plugin before 2.1.2 does not verify ownership of the requested group_id before exporting attendee data via the export endpoint, allowing users with at least the Calendar Manager role to retrieve attendees' PII (name, email, phone, address, payment information) from calendar groups they do not own.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-9576: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Fluent Booking — versions 0

References

Frequently asked questions

What is CVE-2026-9576?
CVE-2026-9576 is a medium-severity vulnerability in Fluent Booking, classified under CWE-200 INFORMATION EXPOSURE. CVSS score: 4.9/10. Published 2026-06-30.
How severe is CVE-2026-9576?
Medium severity. CVSS v3 base score is 4.9 out of 10.