FlagForgeCTF flagForge up to 2.3.0 Public Endpoint /api/user/ private personal information

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FlagForgeCTF flagForge up to 2.3.0. This vulnerability affects unknown code of the file /api/user/ of the component Public Endpoint. This manipulation causes private personal information. This vulnerability is handled as CVE-2025-59843. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in FlagForgeCTF flagForge up to 2.3.0. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /api/user/ of the component Public Endpoint. The manipulation with an unknown input leads to a private personal information vulnerability. The CWE definition for the vulnerability is CWE-359. The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected. As an impact it is known to affect confidentiality. The summary by CVE is:

Flag Forge is a Capture The Flag (CTF) platform. From versions 2.0.0 to before 2.3.2, the public endpoint /api/user/[username] returns user email addresses in its JSON response. The fix, intended for release in 2.3.1 but only available starting in version 2.3.2, removes email addresses from public API responses while keeping the endpoint publicly accessible. Users should upgrade to version 2.3.2 or later to eliminate exposure. There are no workarounds for this vulnerability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-59843 since 09/22/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1589 according to MITRE ATT&CK.

Upgrading to version 2.3.1 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• FlagForgeCTF

Name

• flagForge

Version

• 2.0
• 2.1
• 2.2
• 2.3.0

Website

• Product: https://github.com/FlagForgeCTF/flagForge/

CPE 2.3info

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CPE 2.2info

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