CVE-2026-25728

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{"affected": [{"affectedData": [{"product": "clipbucket-v5", "vendor": "MacWarrior", "versions": [{"status": "affected", "version": "< 5.5.3 - #40"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oxygenz:clipbucket:*:*:*:*:*:*:*:*", "matchCriteriaId": "DFE28189-CAEC-486E-9C4A-44D5B4E86ABA", "versionEndExcluding": "5.5.3-40", "versionStartIncluding": "5.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "ClipBucket v5 es una plataforma de c\u00f3digo abierto para compartir videos. Antes de la versi\u00f3n 5.5.3 - #40, existe una vulnerabilidad de condici\u00f3n de carrera de Tiempo de Verificaci\u00f3n a Tiempo de Uso (TOCTOU) en la funcionalidad de carga de avatares e im\u00e1genes de fondo de ClipBucket. La aplicaci\u00f3n mueve los archivos cargados a una ubicaci\u00f3n accesible desde la web antes de validarlos, creando una ventana donde un atacante puede ejecutar c\u00f3digo PHP arbitrario antes de que el archivo sea eliminado. El archivo cargado fue movido a una ruta accesible desde la web a trav\u00e9s de move_uploaded_file(), luego validado a trav\u00e9s de ValidateImage(). Si la validaci\u00f3n fallaba, el archivo era eliminado a trav\u00e9s de @unlink(). Esta vulnerabilidad est\u00e1 corregida en 5.5.3 - #40."}], "id": "CVE-2026-25728", "lastModified": "2026-06-17T10:25:07.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25728", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-11T15:30:23.992657Z", "version": "2.0.3"}}]}, "published": "2026-02-10T18:16:38.053", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/MacWarrior/clipbucket-v5/commit/09536e6e2ca6d69a2ee83190b588c0b8116dd16d"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-xq7c-m5r2-9wqj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/MacWarrior/clipbucket-v5/security/advisories/GHSA-xq7c-m5r2-9wqj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,5.5.3 - #40)"}}], "product": "clipbucket-v5", "vendor": "macwarrior"}], "analysis": {"en": {"generated_at": "2026-04-17T20:45:03.660456+00:00", "value": {"mitigation_remediation": ["Update ClipBucket to version\u00a05.5.3\u00a0or later, which implements proper validation before the image is made web\u2011accessible.", "Configure the web server to disable PHP execution in the upload directory (e.g., using .htaccess with `php_flag engine off` or equivalent server\u2011like configuration).", "Continuously monitor the upload logs for suspicious or large file uploads and employ a WAF rule that blocks executable content in the avatar/background upload paths."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects any ClipBucket v5 installation running a version earlier than 5.5.3. The fix is contained in commit\u00a05.5.3\u00a0\u2013\u00a0#40, which enforces validation before the file becomes web\u2011accessible. The affected product is the open\u2011source ClipBucket v5 as identified by the CNA MacWarrior.", "description_and_impact": "A time\u2011of\u2011check to time\u2011of\u2011use race condition in ClipBucket v5 allows an attacker to upload an avatar or background image that is moved to a web\u2011accessible directory before the file is validated. If the validation fails, the file is deleted, but the window created before deletion can be exploited to execute arbitrary PHP code, resulting in remote code execution on the server.", "risk_and_exploitability": "With a CVSS score of 9.3 the weakness represents a high severity REMOTE CODE EXECUTION. The EPSS score is below 1\u202f%, indicating a low current exploitation probability, although the threat remains significant because the attack can be carried out from a standard upload form without elevated privileges. The vulnerability is not listed in the CISA KEV catalog, but the lack of a public exploit does not change the potential impact. Based on the description it is inferred that an attacker can upload a maliciously crafted image file through the avatar or background upload interface to trigger the race condition and gain code execution."}}}}, "created": "2026-02-10T21:41:58.815082+00:00", "updated": "2026-04-17T20:45:25.780469+00:00", "vendors": ["macwarrior", "macwarrior$PRODUCT$clipbucket-v5"]}