CVE-2026-55381: InvoiceShelf: IDOR in InvoiceShelf estimate-to-invoice conversion allows any company user to read and tamper with other companies' estimates
InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.0, POST /api/v1/estimates/{estimate}/convert-to-invoice in ConvertEstimateController authorizes only the caller's create-invoice ability and does not authorize access to the route-bound Estimate. Because route-model binding can resolve an estimate from any company, an authenticated user with create-invoice ability can copy another company's line items, prices, totals, taxes, notes, currency, and customer data into an invoice in the attacker's company. The victim company's configured conversion action reaches checkForEstimateConvertAction and can also change or delete the original estimate. This issue is fixed in version 2.4.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
InvoiceShelfto a version that resolves this vulnerability.Fixed in 2.4.0
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated InvoiceShelf user who has permission to create invoices can exploit it. The attacker does not need access to the other company's estimate.
What data or actions are exposed?
An attacker can copy another company's estimate line items, prices, totals, taxes, notes, currency, and customer data into an invoice in the attacker's company. Depending on the victim company's configured conversion action, the original estimate may also be changed or deleted.
Are deployments on the fixed release affected?
No. The issue is fixed in InvoiceShelf version 2.4.0; versions prior to 2.4.0 are affected.