CVE-2025-21623 | ClipBucket V5 Unauthenticated Template Directory Update to Denial-of-Service

Exp

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.

Published: 2025-01-07 Last update: 2025-09-05 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-21623 is rated High Exploit Risk (72.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.36%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-21623

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-21623

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-17 1.98% 1.36% -0.62%
2 2026-02-16 0.91% 1.98% +1.07%
3 2026-02-15 — 0.91% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21623

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2025-21623

Affected software / configurations for CVE-2025-21623

Vendor Product Version Raw CPE
oxygenz clipbucket >= 5.3, < 5.5.1-238 cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*

References for CVE-2025-21623

cvelogic Threat Intelligence