CVE-2026-72837 PUBLISHED

File Browser before 2.63.20 Privilege Escalation via Proxy Authentication

Assigner: VulnCheck
Reserved: 10.08.2026 Published: 14.08.2026 Updated: 14.08.2026

File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	filebrowser
Product	filebrowser
Versions	Default: unaffected affected from 0 to 2.63.20 (excl.) Version 2.63.20 is unaffected

CVE-2026-72837 PUBLISHED

File Browser before 2.63.20 Privilege Escalation via Proxy Authentication

Metrics

Product Status

Credits

References

Problem Types