CVE-2026-88003: Auth Bypass

Description

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2, InvoicePlane fails to revoke administrative privileges after a role downgrade because Admin_Controller trusts the user_type snapshot stored in an existing session instead of revalidating ip_users.user_type. When one administrator downgrades another account, the target's active session continues to authorize administrative requests. The downgraded user can use Users::form() to set user_type back to 1, restoring the database role and making the privilege escalation persistent. This vulnerability is fixed in 1.7.2.

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Weakness Type (CWE)

CWE-863 Incorrect Authorization

References

Other References

https://github.com/InvoicePlane/InvoicePlane/commit/904847f4e87b66fd6743cf9cc6f88b66c7fc3b81 https://github.com/InvoicePlane/InvoicePlane/commit/daa49ce3a50e0c93e01459b69c0d61bfc23d23eb https://github.com/InvoicePlane/InvoicePlane/releases/tag/v1.7.2 https://github.com/InvoicePlane/InvoicePlane/security/advisories/GHSA-25xj-pj36-wpp8

Frequently Asked Questions

What is CVE-2026-88003? +

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. Prior to 1.7.2, InvoicePlane fails to revoke administrative privileges after a role downgrade because Admin_Controller trusts the user_type snapshot stored in an existing session instead of revalidating ip_users.user_type. When one administrator downgrades another account, the target's active session continues to authorize administrative requests. The downgraded user can use Users::form() to set user_type back to 1, restoring the database role and making the privilege escalation persistent. This vulnerability is fixed in 1.7.2.

How do I check if I'm vulnerable to CVE-2026-88003? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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