Description
Bitwarden Server before 2026.5.0 contains a broken access control vulnerability that allows any authenticated user to access arbitrary organization billing data by supplying an arbitrary organizationId to the PreviewInvoiceController endpoints without membership or authorization checks. Attackers can exploit the missing ManageOrganizationBillingRequirement on the preview invoice endpoints to retrieve Stripe-computed tax totals, subscription status, and billing details derived from any target organization's real customer and subscription data.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality (Vulnerable System)
Low
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected products
- bitwarden / server0 – 2026.5.0
References
- MISChttps://sanjokkarki.com.np/blog/bitwarden-preview-invoice-idor
- PATCHhttps://github.com/bitwarden/server/releases/tag/v2026.5.0
- PATCHhttps://github.com/bitwarden/server/pull/7583
- PATCHhttps://github.com/bitwarden/server/commit/0a3d9f9deb7d407503207b0d0ca8f0165a890bee
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/bitwarden-server-broken-access-control-via-previewinvoicecontroller