CVE-2021-3977: Invoiceninja Invoice Ninja

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

invoiceninja is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected products

• Invoiceninja Invoice Ninja: before 4.5.47 (fixed in 4.5.47); from 5.0, before 5.3.33 (fixed in 5.3.33)

Published 2021-12-24. Last modified 2026-06-17.