@better-auth/stripe before 1.6.21 Authorization Bypass via Organization Subscription

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

@better-auth/stripe versions >= 1.4.11 and < 1.6.21, and >= 1.7.0-beta.0 and < 1.7.0-beta.10, contain an authorization bypass in organization subscription actions. The middleware validates the organization ID taken from the request query string against the authorizeReference callback, but the handler reads the organization ID only from the request body and falls back to the caller's active organization from their session. When these differ, an authenticated member of multiple organizations can perform subscription actions (cancel, change plan, restore, billing portal access) against an organization they belong to but should not manage, and can access another organization's billing details including payment methods, invoices, and subscription state.

Source published

1 Aug 2026 12:22:18 UTC

Source modified

8 Oct 2026 15:24:07 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1 · 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

@better-auth/stripe versions >= 1.4.11 and < 1.6.21, and >= 1.7.0-beta.0 and < 1.7.0-beta.10, contain an authorization bypass in organization subscription actions. The middleware validates the organization ID taken from the request query string against the authorizeReference callback, but the handler reads the organization ID only from the request body and falls back to the caller's active organization from their session. When these differ, an authenticated member of multiple organizations can perform subscription actions (cancel, change plan, restore, billing portal access) against an organization they belong to but should not manage, and can access another organization's billing details including payment methods, invoices, and subscription state.

Source published

1 Aug 2026 13:17:03 UTC

Source modified

23 Oct 2026 23:10:00 UTC

Observed here

25 Oct 2026 15:18:51 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Secondary · 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

### Am I affected? You are affected if all of these are true: - You use `@better-auth/stripe` from version 1.4.11 up to a patched version below. This covers the stable line through 1.6.20 and every 1.7.0 beta through 1.7.0-beta.9. - The Stripe plugin has subscriptions turned on (`subscription.enabled: true`). - Organization subscriptions are turned on (`organization.enabled: true`) and you have set an `authorizeReference` callback. - A user can join more than one org. So a user can be a member of an org whose billing they should not manage. You are not affected if you only use user subscriptions. You are also not affected if org subscriptions are turned off. ### Summary An org subscription action can run against the wrong org. The actions are cancel, change plan, restore, and open the billing portal. The plugin checks permission against the org id in the request query string. It then runs the action against the caller's active org from their session. When these two ids differ, a member can act on billing for an org they may not manage. The target is always an org the caller belongs to. ### Details The plugin runs two steps for each org subscription action. First, a middleware decides if the caller may use the requested org. It reads the org id from the request body or the query string. It then passes that id to your `authorizeReference` callback. Second, the route handler runs the action. The handler reads the org id from the request body only. It falls back to the active org in the session when the body has no id. The gap is the query string. A caller puts an org they may manage in the query string. The middleware approves that org. The handler ignores the query string. It finds no id in the body, so it acts on the caller's active org instead. The check and the action no longer agree. ### Patches Upgrade to one of these patched versions: - Stable: `@better-auth/[email protected]` or later. - Beta: `@better-auth/[email protected]` or later. The fix resolves the org id once in the middleware. It passes that single value to the handler. The approved org and the acted-on org are now always the same. ### Workarounds If you cannot upgrade, make `authorizeReference` approve only the caller's active org. Return `false` when the requested id is not the active org id. Keep your existing role check too: ```ts if (referenceId !== session.activeOrganizationId) { return false; } ``` This forces the approved org and the active org to be the same value. ### Impact - A signed-in member can make a subscription action run against the wrong org. The action can be cancel, change plan, restore, or billing portal. The target is limited to orgs the member belongs to. - Through the billing portal, a member can reach another org's billing details. This includes payment methods, invoices, and subscription state. ### Credit Reported and fixed by Taesu ([@bytaesu](https://github.com/bytaesu)).

Source published

24 Jul 2026 15:43:22 UTC

Source modified

2 Aug 2026 03:56:44 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Publisher rating · HIGH