Joomshaper Easy Store Extension up to 3.0.0 Guest Checkout email authorization

Summaryinfo

A vulnerability labeled as problematic has been found in Joomshaper Easy Store Extension up to 3.0.0. This impacts an unknown function of the component Guest Checkout. Executing a manipulation of the argument email can lead to authorization. This vulnerability is tracked as CVE-2026-90899. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Joomshaper Easy Store Extension up to 3.0.0. This vulnerability affects an unknown part of the component Guest Checkout. The manipulation of the argument email with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality. CVE summarizes:

Joomla Extension - joomshaper.com - Unauthenticated PII Exposure via IDOR in Guest Checkout in Easy Store extension 1.0.0-3.0.0 - The checkout.searchGuestUser endpoint allowed querying guest checkout records solely by supplying an email address. The server returned complete shipping details (full name, phone number, street address, city, postal code, and country) directly from the #__easystore_guests table with no authentication, session validation, or ownership checks. An unauthenticated attacker could iterate through email lists to enumerate guest customers and harvest sensitive Personally Identifiable Information (PII). Resolved by removing the unauthenticated server-side guest lookup endpoint entirely and migrating autofill functionality to client-side localStorage protected by explicit user consent.

The advisory is shared for download at joomshaper.com. This vulnerability was named CVE-2026-90899 since 09/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/23/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Joomshaper

Name

• Easy Store Extension

Version

• 3.0

CPE 2.3info

• 🔒

CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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