CVE-2025-59843
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-26

Last updated on: 2025-10-08

Assigner: GitHub, Inc.

Description
Flag Forge is a Capture The Flag (CTF) platform. From versions 2.0.0 to before 2.3.1, the public endpoint /api/user/[username] returns user email addresses in its JSON response. The problem has been patched in FlagForge version 2.3.1. The fix removes email addresses from public API responses while keeping the endpoint publicly accessible. Users should upgrade to version 2.3.1 or later to eliminate exposure. There are no workarounds for this vulnerability.
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Meta Information
Published
2025-09-26
Last Modified
2025-10-08
Generated
2026-06-16
AI Q&A
2025-09-26
EPSS Evaluated
2026-06-15
NVD
CVE-2025-59843
EUVD
EUVD-2025-31370
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
flagforge flagforge From 2.0 (inc) to 2.3.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
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.
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Executive Summary

This vulnerability in Flag Forge versions 2.0.0 to before 2.3.1 causes the public API endpoint /api/user/[username] to expose user email addresses in its JSON response. This means anyone accessing this endpoint could retrieve email addresses of users, potentially compromising user privacy. The issue was fixed in version 2.3.1 by removing email addresses from the public API response while keeping the endpoint accessible.

Impact Analysis

The vulnerability can lead to exposure of user email addresses to unauthorized parties, which may result in privacy breaches, increased risk of phishing attacks, spam, or other malicious activities targeting users. It compromises the confidentiality of user information.

Compliance Impact

Exposing user email addresses publicly without consent can violate privacy requirements under regulations such as GDPR and HIPAA, which mandate protection of personally identifiable information. This vulnerability could lead to non-compliance due to unauthorized disclosure of personal data.

Mitigation Strategies

Upgrade Flag Forge to version 2.3.1 or later, as this version removes email addresses from the public API responses. There are no workarounds for this vulnerability.

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