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GHSA-3ghg-3787-w2xr

HighCVSS 7.5 / 10
Published Jan 8, 2026·Last modified Feb 3, 2026
Affected Components(0)

No affected components available

Description

Summary

An Unauthenticated Insecure Direct Object Reference (IDOR) vulnerability was identified that allows an unauthenticated attacker to access guest address information without supplying valid credentials or session cookies.

Details

During testing, it was observed that all guest users can make an unauthenticated request to retrieve address data belonging to other guest users by manipulating object identifiers. The attacker would need to know the storefront URL structure to perform this attack (which can be learnt after creating a registered user account).

Affected Component(s)

  • Address Edit endpoint: /addresses/{addressId}/edit

Root Cause

  • Faulty authorization check in CanCanCan Ability class:
- can :manage, ::Spree::Address, user_id: user.id
+ can :manage, ::Spree::Address, user_id: user.id if user.persisted?

the user object in Spree::Ability class for guest users is a Spree.user_class.new object.

Addresses endpoint to access it is part of the spree_storefront gem. Headless builds using APIs are not affected, as the Addresses endpoint there is only for registered users, and records are scoped to the currently signed-in user.

PoC

Preconditions

  • No authentication required
  • No cookies or session tokens set

To reproduce this vulnerability simply perform the request shown below, replacing the number with an arbitrary value.

For the initial request the Guest Address id = 6 is used to obtain the information

Request GET /addresses/6/edit

<img width="291" height="454" alt="IDOR Guest" src="https://github.com/user-attachments/assets/d21d01a2-8fa5-4ab1-b9e2-6ee65bd6b5a2" />

Repeat the request and check the response, in this example using Guest Address id = 2.

Request GET /addresses/2/edit

<img width="360" height="519" alt="IDOR Guest Address ID 2" src="https://github.com/user-attachments/assets/1ce35990-3d11-4f47-9bba-266b5361313c" />

Impact

An unauthenticated attacker can:

  • Enumerate and retrieve guest address information (Addresses associated with User accounts are NOT affected)
  • Access personally identifiable information (PII) such as:
  • Full names
  • Physical addresses
  • Phone numbers (if present)

This vulnerability could lead to:

  • Privacy violations
  • Regulatory compliance issues (e.g., GDPR)
  • Loss of user trust
Risk Scores
Base Score
7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.38%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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