FOSSBilling up to 0.7.2 Email Confirmation Enforcement improper authentication

Summaryinfo

A vulnerability classified as problematic was found in FOSSBilling up to 0.7.2. This impacts an unknown function of the component Email Confirmation Enforcement. The manipulation results in improper authentication. This vulnerability is reported as CVE-2026-53642. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FOSSBilling up to 0.7.2. Affected is an unknown function of the component Email Confirmation Enforcement. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality. CVE summarizes:

FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when the "Require Email Confirmation" setting is enabled, a logged-in client with an unverified email address (`email_approved = 0`) can access all client-area pages (e.g. `/client/balance`, `/client/order/list`, `/client/invoice`) and read real account data, including wallet balances and transaction history. The API-side enforcement correctly restricts unverified clients to only profile-related endpoints, but the page-side enforcement is overly permissive, allowing any request whose path starts with `/client`. Version 0.8.0 contains a fix. No known workarounds that don't involve modifying the source code are available.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-53642 since 06/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.8.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-41967). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Billing Software

Name

• FOSSBilling

Version

• 0.7.0
• 0.7.1
• 0.7.2

Website

• Product: https://github.com/FOSSBilling/FOSSBilling/

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Once again VulDB remains the best source for vulnerability data.

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