CVE-2021-24787: Client Invoicing by Sprout Invoices < 19.9.7 - Admin+ Stored Cross-Site Scripting

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-17 · updated 2026-06-17
Weakness: CWE-79

Description

The Client Invoicing by Sprout Invoices WordPress plugin before 19.9.7 does not sanitise and escape some of its settings, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed

Affected products

Client Invoicing by Sprout Invoices – Easy Estimates and Invoices for WordPress: before 19.9.7 — fixed in 19.9.7

How to fix

Upgrade to a fixed version: Client Invoicing by Sprout Invoices – Easy Estimates and Invoices for WordPress 19.9.7. Check the vendor advisory for mitigations.

References

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