ClipBucket V5 Unauthenticated Template Directory Update to Denial-of-Service

published 2025-01-07 22 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-2575

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

ClipBucket V5 provides open source video hosting with PHP. Prior to 5.5.1 - 238, ClipBucket V5 allows unauthenticated attackers to change the template directory via a directory traversal, which results in a denial of service.

Patch / fix

fixed in 1 links 1

oxygenz clipbucket 5.5.1-238

github.com/MacWarrior/clipbucket-v5@75d663f commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 22 mo ago (2025-01-07)

Exploit prediction

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-ffhj-hprx-7qvr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

MacWarrior clipbucket-v5

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory
CWE-306 Missing Authentication for Critical Functionality

References

github.com /MacWarrior/clipbucket-v5/commit/75d663f010cd8569eb9e278f030838174fb30188
patch
github.com /MacWarrior/clipbucket-v5/security/advisories/GHSA-ffhj-hprx-7qvr
exploit, vendor-advisory

Sources

CVE List CVE-2025-21623
NVD CVE-2025-21623

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary