What’s Vulnerable › Vulnerabilities

CVE-2021-32645: Open Redirect in tenancy

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-27 · updated 2026-06-17
• Weakness: CWE-601

Description

Tenancy multi-tenant is an open source multi-domain controller for the Laravel web framework. In some situations, it is possible to have open redirects where users can be redirected from your site to any other site using a specially crafted URL. This is only the case for installations where the default Hostname Identification is used and the environment uses tenants that have `force_https` set to `true` (default: `false`). Version 5.7.2 contains the relevant patches to fix this bug. Stripping the URL from special characters to prevent specially crafted URL's from being redirected to. As a work around users can set the `force_https` to every tenant to `false`, however this may degrade connection security.

Affected products

• tenancy multi-tenant: from 5.6.0 before 5.7.2 — fixed in 5.7.2

How to fix

Upgrade to a fixed version: tenancy multi-tenant 5.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/tenancy/multi-tenant/commit/9c837a21bccce9bcaeb90033ef200d84f0d9e164
• https://github.com/tenancy/multi-tenant/security/advisories/GHSA-4r8q-gv9j-3xx6
• https://packagist.org/packages/hyn/multi-tenant
• https://webmasters.googleblog.com/2009/01/open-redirect-urls-is-your-site-being.html
• https://github.com/tenancy/multi-tenant/commit/9c837a21bccce9bcaeb90033ef200d84f0d9e164
• https://github.com/tenancy/multi-tenant/security/advisories/GHSA-4r8q-gv9j-3xx6
• https://packagist.org/packages/hyn/multi-tenant
• https://webmasters.googleblog.com/2009/01/open-redirect-urls-is-your-site-being.html

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