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CVE Record

CVE-2021-32645: Open Redirect in tenancy

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.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-32645 lets an attacker abuse some tenancy multi-tenant Laravel deployments to send a user from the legitimate site to another site. The main business risk is phishing, brand abuse, and user trust damage, not server takeover. The vendor patched it in version 5.7.2.

Executive priority

Treat this as a moderate-priority web application fix. It is unlikely to compromise infrastructure directly, but exposed public sites could support phishing campaigns using trusted URLs. Prioritize internet-facing tenant applications and customer login flows.

Technical view

The flaw is CWE-601 open redirect in tenancy multi-tenant versions 5.6.0 through before 5.7.2. It applies when default Hostname Identification is used and tenants have force_https set to true. The patch strips special characters from URLs to prevent crafted redirect behavior.

Likely exposure

Exposure is limited to Laravel applications using tenancy multi-tenant versions >=5.6.0 and <5.7.2 with default Hostname Identification and tenant force_https enabled. Installations without those conditions are not described as affected in the provided sources.

Exploitation context

The sources describe user interaction as required and list CVSS 4.3. The bundle does not include CISA KEV status or other evidence of active exploitation. Open redirects are commonly useful in phishing because links appear to start on a trusted domain.

Researcher notes

No CPEs are provided. The affected condition is configuration-specific, so version checks alone are insufficient. The advisory names version 5.7.2 as patched and notes a workaround with a security tradeoff. No active exploitation evidence is present in the supplied bundle.

Mitigation direction

  • Upgrade tenancy multi-tenant to version 5.7.2 or later.
  • Review the GitHub advisory for vendor-confirmed affected conditions.
  • If upgrade is delayed, evaluate setting force_https to false per tenant.
  • Document any force_https workaround because it may reduce connection security.
  • Check vendor guidance before changing routing or tenant identification behavior.

Validation and detection

  • Inventory applications using the tenancy multi-tenant package.
  • Confirm installed versions are not >=5.6.0 and <5.7.2.
  • Check whether default Hostname Identification is enabled.
  • Identify tenants where force_https is set to true.
  • Review staging behavior for unexpected external redirects after remediation.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-601: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-32645 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.3Medium
CVSS 3.0 vector shape for CVE-2021-32645Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
tenancymulti-tenant>=5.6.0, < 5.7.2Listed
Weakness

CWE details

CWE-601

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-601 · source CWE mapping

URL Redirection to Untrusted Site ('Open Redirect')

URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs