Authorization Bypass Issue in Invoice123 Plugin for WordPress
CVE-2026-9857

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
Invoice123
Vendor
CVE Published:
10 July 2026

What is CVE-2026-9857?

The Invoice123 plugin for WordPress has a critical authorization bypass vulnerability that allows authenticated users, including those with subscriber-level access, to modify settings and overwrite the plugin's API key. This lack of proper user verification could lead to unauthorized changes in invoice configurations and manipulation of tax data in the WooCommerce system. Site administrators must ensure they use the latest versions of the plugin and review user access permissions to mitigate this risk.

Affected Version(s)

Invoice123 0 <= 1.7.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/saskaita123-lt...
https://plugins.trac.wordpress.org/browser/saskaita123-lt...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Benedictus Jovan (aillesiM)
.