CVE-2025-61777: Flag Forge is a Capture The Flag (CTF) platform

This month

CRITICAL 9.4REMOTEUPGRADE

CVE-2025-61777 is a critical-severity flaw (CVSS 9.4) affecting flagforge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Flag Forge is a Capture The Flag (CTF) platform. Starting in version 2.0.0 and prior to version 2.3.2, the `/api/admin/badge-templates` (GET) and `/api/admin/badge-templates/create` (POST) endpoints previously allowed access without authentication or authorization. This could have enabled unauthorized users to retrieve all badge templates and sensitive metadata (createdBy, createdAt, updatedAt) and/or create arbitrary badge templates in the datab

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-200, CWE-284, CWE-306
Published	2025-10-06
Last modified	2026-10-09

Publisher (CNA): GitHub, Inc. · Vendor: flagforge

Last updated 2026-10-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-06 17:16 UTCPublished CVE record published
2026-10-09 10:10 UTCUpdated Record last modified

flagforge flagforge UPGRADE

Affected: >= 2.0 and < 2.3.2

Fixed in: 2.3.2

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy flagforge || rpm -q flagforge || flagforge --version

2. UPGRADE to 2.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flagforge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flagforge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison flagforge sudo apt install flagforge=<VERSION_BEFORE_2.0> sudo apt-mark hold flagforge

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flagforge sudo dnf downgrade flagforge-<VERSION_BEFORE_2.0> sudo dnf versionlock add flagforge

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-61777?

flagforge: upgrade to 2.3.2. Exact commands for each OS are on this page.

Is CVE-2025-61777 being exploited?

CVE-2025-61777 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-61777 affect?

CVE-2025-61777 affects flagforge. Severity is 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 `/api/admin/badge-templates` (GET) and `/api/admin/badge-templates/create` (POST) endpoints previously allowed access without authent

How urgent is CVE-2025-61777?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-59841 CRITICAL 9.8 UPGRADE Flag Forge is a Capture The Flag (CTF) platform
CVE-2025-59826 HIGH 7.6 DOWNGRADE Flag Forge is a Capture The Flag (CTF) platform
CVE-2025-59932 HIGH 8.6 UPGRADE Flag Forge is a Capture The Flag (CTF) platform
CVE-2025-59843 MEDIUM 5.3 UPGRADE Flag Forge is a Capture The Flag (CTF) platform
CVE-2026-21868 HIGH 7.5 UPGRADE Flag Forge is a Capture The Flag (CTF) platform

References

← Back to latest CVEs