CVE-2025-598436.9MediumCWE-359

CVE-2025-59843: FlagForgeCTF Exposes User Emails via Public /api/user/[username] API

FlagForgeCTF · flagForge

Affected: FlagForgeCTF · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.4%probability of exploitation in the next 30 days

36th percentile

050100

Higher than 36% of scored CVEs

6.9MediumCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

FlagForgeCTF · flagForge>= 2.0.0, < 2.3.2

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Exposure of Private Personal Information to an Unauthorized Actor · Information Disclosure
Vendor: FlagForgeCTF
Published: September 2025
Band: Unlikely (under 1%), September 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-59843 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.