What is CVE-2026-87797?

CVE-2026-87797 is a medium-severity vulnerability in Sprout Invoices, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-12.

How severe is CVE-2026-87797?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Sprout Invoices

CVE-2026-87797

The Sprout Invoices WordPress plugin before 20.8.16 does not perform a capability or ownership check before allowing a private note to be overwritten through one of its AJAX actions, allowing any authenticated user such as a subscriber to overwrite private notes on records belonging to other users.

Vulnerability class: Broken Access Control

Published 2026-09-12 · last modified 2026-09-14.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.8th percentile), scored 2026-10-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Sprout Invoices

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

wpscan.com/vulnerability/ded55e47-568d-4702-b043-4707e4182a09/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-87797?: CVE-2026-87797 is a medium-severity vulnerability in Sprout Invoices, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-12.
How severe is CVE-2026-87797?: Medium severity. CVSS v3 base score is 4.3 out of 10.