CVE-2025-0471: Unrestricted file upload vulnerability in the PMB platform, affecting versions 4.0.10 and above

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CRITICAL 9.9DOWNGRADE

CVE-2025-0471 is a critical-severity flaw (CVSS 9.9) affecting pmb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unrestricted file upload vulnerability in the PMB platform, affecting versions 4.0.10 and above. This vulnerability could allow an attacker to upload a file to gain remote access to the machine, being able to access, modify and execute commands freely.

Why this priority

Critical severity

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

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-01-16
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: sigb

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

Am I affected?

Timeline

2025-01-16 13:15 UTCPublished CVE record published
2026-06-17 08:26 UTCUpdated Record last modified

sigb pmb DOWNGRADE

Affected: >= 4.0.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.10

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.10 (Debian / Ubuntu)

apt-cache madison pmb sudo apt install pmb=<VERSION_BEFORE_4.0.10> sudo apt-mark hold pmb

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

dnf --showduplicates list pmb sudo dnf downgrade pmb-<VERSION_BEFORE_4.0.10> sudo dnf versionlock add pmb

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-2025-0471?

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

Is CVE-2025-0471 being exploited?

CVE-2025-0471 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-2025-0471 affect?

CVE-2025-0471 affects pmb. Severity is critical (CVSS 9.9). Unrestricted file upload vulnerability in the PMB platform, affecting versions 4.0.10 and above. This vulnerability could allow an attacker to upload a file to gain remote access to the machine, being able to access, modify and execute comm

How urgent is CVE-2025-0471?

Priority 47/100. Critical severity

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References

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