Vulnerability in Macwarrior Clipbucket-V5
CVE-2026-25728
ClipBucket v5 is an open source video sharing platform. Prior to 5.5.3 - #40, a Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability exists in ClipBucket's avatar and background image upload functionality. The application moves uploaded files to a web-accessible location before validating them, creating a window where an attacker can execute arbitrary PHP code before the file is deleted. The uploaded file was moved to a web-accessible path via move_uploaded_file(), then validated via ValidateImage(). If validation failed, the file was deleted via @unlink(). This vulnerability is fixed in 5.5.3 - #40.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (37.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Macwarrior Clipbucket-V5 — versions < 5.5.3 - #40
- Oxygenz Clipbucket
Weakness classification (CWE)
References
- github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-xq7c-m5r2-9wqj (Exploit, Mitigation, Vendor Advisory)
- github.com/MacWarrior/clipbucket-v5/commit/09536e6e2ca6d69a2ee83190b588c0b8116d… (Patch)
Frequently asked questions
- What is CVE-2026-25728?
- CVE-2026-25728 is a high-severity vulnerability in Macwarrior Clipbucket-V5, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2026-02-10.
- How severe is CVE-2026-25728?
- High severity. CVSS v3 base score is 7.5 out of 10.