How severe is CVE-2025-21624?

CVE-2025-21624 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21624 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21624?

CVE-2025-21624 affects Oxygenz Clipbucket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-21624?

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

Does CVE-2025-21624 have an EU (EUVD) identifier?

Yes. CVE-2025-21624 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2576.

When was CVE-2025-21624 published?

CVE-2025-21624 was published on 2025-01-07 and last updated on 2026-06-17.

CVE-2025-21624

CVE-2025-21624 is a critical-severity vulnerability in Oxygenz Clipbucket with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2576
Weakness: CWE-434
Affected product: Oxygenz Clipbucket
Published: 2025-01-07
Last modified: 2026-06-17

Description

ClipBucket V5 provides open source video hosting with PHP. Prior to 5.5.1 - 239, a file upload vulnerability exists in the Manage Playlist functionality of the application, specifically surrounding the uploading of playlist cover images. Without proper checks, an attacker can upload a PHP script file instead of an image file, thus allowing a webshell or other malicious files to be stored and executed on the server. This attack vector exists in both the admin area and low-level user area. This vulnerability is fixed in 5.5.1 - 239.

Frequently asked questions

What is CVE-2025-21624?: ClipBucket V5 provides open source video hosting with PHP. Prior to 5.5.1 - 239, a file upload vulnerability exists in the Manage Playlist functionality of the application, specifically surrounding the uploading of playlist cover images. Without proper checks, an attacker can upload a PHP script file instead of an image file, thus allowing a webshell or other malicious files to be stored and executed on the server. This attack vector exists in both the admin area and low-level user area. This vulnerability is fixed in 5.5.1 - 239.
How severe is CVE-2025-21624?: CVE-2025-21624 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21624 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21624?: CVE-2025-21624 affects Oxygenz Clipbucket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-21624?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-21624 have an EU (EUVD) identifier?: Yes. CVE-2025-21624 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2576.
When was CVE-2025-21624 published?: CVE-2025-21624 was published on 2025-01-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*

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