EUVD-2026-19776
GHSA-v9w4-gm2x-6rvf
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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
Lifecycle Timeline
4Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, when an admin revokes a user's Share and Download permissions, existing share links created by that user remain fully accessible to unauthenticated users. The public share download handler does not re-check the share owner's current permissions. This vulnerability is fixed in 2.63.1.
Analysis
Authorization bypass in File Browser allows unauthenticated access to shared files after permissions revoked. When administrators revoke a user's Share and Download permissions in File Browser (versions prior to 2.63.1), previously created share links remain accessible to unauthenticated users due to missing permission re-validation in the public share handler. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Identify all File Browser instances in your environment and document current versions; disable or audit all active share links pending security review. Within 7 days: Upgrade all File Browser installations to version 2.63.1 or later and revoke/recreate all share links created under previous versions. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today