How severe is CVE-2025-59826?

CVE-2025-59826 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2025-59826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59826?

CVE-2025-59826 affects Flagforge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59826?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59826 have an EU (EUVD) identifier?

Yes. CVE-2025-59826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30932.

When was CVE-2025-59826 published?

CVE-2025-59826 was published on 2025-09-23 and last updated on 2026-06-17.

CVE-2025-59826

CVE-2025-59826 is a high-severity vulnerability in Flagforge with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30932
Weakness: CWE-862
Affected product: Flagforge
Published: 2025-09-23
Last modified: 2026-06-17

Description

Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, non-admin users can create arbitrary challenges, potentially introducing malicious, incorrect, or misleading content. This issue has been patched in version 2.2.0.

Frequently asked questions

What is CVE-2025-59826?: Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, non-admin users can create arbitrary challenges, potentially introducing malicious, incorrect, or misleading content. This issue has been patched in version 2.2.0.
How severe is CVE-2025-59826?: CVE-2025-59826 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2025-59826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59826?: CVE-2025-59826 affects Flagforge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59826 have an EU (EUVD) identifier?: Yes. CVE-2025-59826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30932.
When was CVE-2025-59826 published?: CVE-2025-59826 was published on 2025-09-23 and last updated on 2026-06-17.

References

https://github.com/FlagForgeCTF/flagForge/security/advisories/GHSA-q7pg-qchv-3pc5

Affected products (1)

cpe:2.3:a:flagforge:flagforge:2.1.0:*:*:*:*:*:*:*

More vulnerabilities in Flagforge

CVE-2025-59841 — Critical (CVSS 9.8): Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.2.0 to before 2.3.1, the FlagForge web application…
CVE-2025-59827 — Critical (CVSS 9.8): Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, the /api/admin/assign-badge endpoint lacks proper…
CVE-2025-61777 — Critical (CVSS 9.4): Flag Forge is a Capture The Flag (CTF) platform. Starting in version 2.0.0 and prior to version 2.3.2, the…
CVE-2025-59932 — High (CVSS 8.6): Flag Forge is a Capture The Flag (CTF) platform. From versions 2.0.0 to before 2.3.1, the /api/resources endpoint…
CVE-2026-21868 — High (CVSS 7.5): Flag Forge is a Capture The Flag (CTF) platform. Versions 2.3.2 and below have a Regular Expression Denial of Service…
CVE-2025-59833 — High (CVSS 7.5): Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.1.0 to before 2.3.0, the API endpoint GET…

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