CVE-2025-45479: Insufficient security mechanisms for created containers in educoder challenges v1.0 allow attackers to execute

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-45479 is a critical-severity flaw (CVSS 9.8) affecting challenges. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Insufficient security mechanisms for created containers in educoder challenges v1.0 allow attackers to execute arbitrary code via injecting crafted content into a container.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-94
Published	2025-07-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: educoder

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-07 16:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

educoder challenges DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison challenges sudo apt install challenges=<VERSION_BEFORE_1.0> sudo apt-mark hold challenges

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list challenges sudo dnf downgrade challenges-<VERSION_BEFORE_1.0> sudo dnf versionlock add challenges

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-2025-45479?

challenges: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-45479 being exploited?

CVE-2025-45479 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-2025-45479 affect?

CVE-2025-45479 affects challenges. Severity is critical (CVSS 9.8). Insufficient security mechanisms for created containers in educoder challenges v1.0 allow attackers to execute arbitrary code via injecting crafted content into a container.

How urgent is CVE-2025-45479?

Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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