Gophish up to 0.12.1 Login Authentication AdminServer.Login username information disclosure

Summaryinfo

A vulnerability classified as problematic has been found in Gophish up to 0.12.1. This affects the function AdminServer.Login of the component Login Authentication. The manipulation of the argument Username leads to information disclosure. This vulnerability is listed as CVE-2026-107269. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Gophish up to 0.12.1. It has been rated as problematic. This issue affects the function AdminServer.Login of the component Login Authentication. The manipulation of the argument username with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Gophish through 0.12.1 contains a timing discrepancy vulnerability in AdminServer.Login that allows unauthenticated attackers to enumerate valid usernames by measuring login response times. Attackers can submit candidate usernames to POST /login and detect bcrypt comparison delays for existing accounts, narrowing targets for password guessing or credential stuffing.

It is possible to read the advisory at blog.ostorlab.co. The identification of this vulnerability is CVE-2026-107269 since 10/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/07/2026). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

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

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Productinfo

Name

• Gophish

Version

• 0.12.0
• 0.12.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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