What’s Vulnerable › Vulnerabilities

CVE-2026-77929: ClipBucket < 5.5.3-#182 Remote Code Execution via Photo Upload Endpoint

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-22
• Weakness: CWE-434

Description

ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved.

Affected products

• MacWarrior clipbucket-v5: before 5.5.3-#182 — fixed in 5.5.3-#182

How to fix

Upgrade to a fixed version: MacWarrior clipbucket-v5 5.5.3-#182. Check the vendor advisory for mitigations.

References

• https://github.com/MacWarrior/clipbucket-v5/commit/61cce55ab26ef88fb782dfde47b44c17c56978cd
• https://github.com/MacWarrior/clipbucket-v5/releases/tag/5.5.3-%23182
• https://www.vulncheck.com/advisories/clipbucket-remote-code-execution-via-photo-upload-endpoint

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