CVE-2025-59833Network attack vector

Unauthenticated hint disclosure via misspelled property deletion

Published Sep 24, 2025 · Updated Sep 24, 2025

Information disclosure in FlagForgeCTF flagForge 2.1.0 to before 2.3.0 allows remote attackers to read locked hints via the problem API. The GET /api/problems/:id handler deletes the misspelled hinsts property from questionData, leaving the actual hints property in every default response. No authentication or hint-unlock state is required, so direct requests reveal all challenge hints without the intended point deduction.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in FlagForgeCTF flagForge 2.1.0 to before 2.3.0 allows remote attackers to read locked hints via the problem API. The GET /api/problems/:id handler deletes the misspelled hinsts property from questionData, leaving the actual hints property in every default response. No authentication or hint-unlock state is required, so direct requests reveal all challenge hints without the intended point deduction.

The record

CVE
CVE-2025-59833
Published
Sep 24, 2025
Updated
Sep 24, 2025
Vendor
FlagForgeCTF
Product
flagForge
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.1.0, < 2.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlagForgeCTF · flagForgeversion=>= 2.1.0, < 2.3.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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