CVE-2026-87797: unknown sprout invoices Missing Authorization
Vulnerability summary
CVE-2026-87797 is a medium (CVSS 4.3) Missing Authorization vulnerability in unknown sprout invoices. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 20.8.16.
Timeline
- 12-09-2026PublishedVulnerability first disclosed.
- 12-09-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- wordfenceSource4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.25%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
+0.10 pp
From 0.15% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.
- CWE-639Authorization Bypass Through User-Controlled KeyThe system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Affected systems
Unknown1 product
- sprout invoices< 20.8.16
Wordpress1 product
- sprout-invoices< 20.8.16
2 vendors · 2 products