CVE-2025-55912: An issue in ClipBucket 5.5.0 and prior versions allows an unauthenticated attacker can exploit the plupload en

Q: How do I fix CVE-2025-55912?

clipbucket: upgrade to newer than 5.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-55912 being exploited?

CVE-2025-55912 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-55912 affect?

CVE-2025-55912 affects clipbucket. Severity is high (CVSS 7.3). An issue in ClipBucket 5.5.0 and prior versions allows an unauthenticated attacker can exploit the plupload endpoint in photo_uploader.php to upload arbitrary files without any authentication, due to missing access controls in the upload ha

Q: How urgent is CVE-2025-55912?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.3REMOTEUPGRADE

CVE-2025-55912 is a high-severity flaw (CVSS 7.3) affecting clipbucket. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in ClipBucket 5.5.0 and prior versions allows an unauthenticated attacker can exploit the plupload endpoint in photo_uploader.php to upload arbitrary files without any authentication, due to missing access controls in the upload handler

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-09-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: oxygenz

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

Am I affected?

Timeline

2025-09-18 16:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

oxygenz clipbucket UPGRADE

Affected: <= 5.5.0

Fixed in: newer than 5.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.5.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clipbucket

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: ClipBucket 5.5.0 - Arbitrary File Upload

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-2025-55912?

clipbucket: upgrade to newer than 5.5.0. Exact commands for each OS are on this page.

Is CVE-2025-55912 being exploited?

CVE-2025-55912 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-2025-55912 affect?

CVE-2025-55912 affects clipbucket. Severity is high (CVSS 7.3). An issue in ClipBucket 5.5.0 and prior versions allows an unauthenticated attacker can exploit the plupload endpoint in photo_uploader.php to upload arbitrary files without any authentication, due to missing access controls in the upload ha

How urgent is CVE-2025-55912?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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