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Filebrowser CVE-2025-52900

| EUVDEUVD-2025-19199 MEDIUM
Incorrect Default Permissions (CWE-276)
2025-06-26 security-advisories@github.com GHSA-jj2r-455p-5gvf
5.5
CVSS 3.1 · GitHub Advisory
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V13 - Configuration Default permission hardening
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

An attacker with limited access can gain administrative or root privileges, enabling full control over the affected system. With a CVSS score of 5.5 (MEDIUM), this represents a moderate risk.

Exploit ScenarioDerived

A local attacker exploits a vulnerability in a privileged service or misconfigured permissions to escalate from a standard user to root/administrator.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. The file access permissions for files uploaded to or created from File Browser are never explicitly set by the application. The same is true for the database used by File Browser. On standard servers using File Browser prior to version 2.33.7 where the umask configuration has not been hardened before, this makes all the stated files readable by any operating system account. Version 2.33.7 fixes the issue.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 23:54 CVSS 5.5

RemediationAI

A vendor patch is available — apply it immediately. Apply the principle of least privilege. Keep systems patched. Monitor for suspicious privilege changes. Use mandatory access controls (SELinux, AppArmor).

Affected VersionsENISA

filebrowser < 2.33.7

Affected Packages

go github.com/filebrowser/filebrowser no fix
go github.com/filebrowser/filebrowser/v2 fix: 2.33.7
euvd filebrowser fix: 2.33.7

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 3 packages in go, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Privilege escalation allows a low-privileged user or process to gain elevated permissions beyond what was originally authorized. This vulnerability is classified as Incorrect Default Permissions (CWE-276).

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SUSE MEDIUM

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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

Lifecycle Timeline

3
Patch released
Mar 15, 2026 - 23:54 nvd
Patch available
PoC Detected
Jul 10, 2025 - 01:17 vuln.today
Public exploit code
CVE Published
Jun 26, 2025 - 15:15 nvd
MEDIUM 5.5

Executive ViewAI

Why It Matters

CVE-2025-52900 presents moderate security risk, a incorrect default permissions vulnerability rated CVSS 5.5. Attackers could gain access beyond their authorized level. Proof-of-concept code is publicly available. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: manually tighten permissions on affected resources.

Threat Intelligence Overview

EPSS Score
0.0%
Top 93% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
Poc
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Low

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

CVE-2026-29188 CRITICAL POC
9.1 Mar 05

Unauthorized file operations in File Browser before fix. PoC and patch available.

CVE-2023-39612 CRITICAL POC
9.0 Sep 16

A cross-site scripting (XSS) vulnerability in FileBrowser before v2.23.0 allows an authenticated attacker to escalate pr

CVE-2026-116682 HIGH POC
8.6 Oct 27

Symlink-following read paths in FileBrowser Quantum serve files from outside a user's assigned scope: download, preview,

CVE-2026-73612 HIGH POC
8.6 Aug 13

Recursive operation authorization bypass in File Browser before v2.63.22 permits any authenticated user to copy, rename,

CVE-2026-25890 HIGH POC
8.1 Feb 09

Path normalization bypass in Filebrowser prior to 2.57.1 allows authenticated users to circumvent file access restrictio

CVE-2025-52903 HIGH POC
8.0 Jun 26

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ

CVE-2025-52904 HIGH POC
8.0 Jun 26

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ

CVE-2025-52995 HIGH POC
8.0 Jun 30

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ

CVE-2026-54910 HIGH POC
7.7 Jul 20

Arbitrary file read in FileBrowser Quantum (gtsteffaniak/filebrowser) before 1.4.3-beta lets any authenticated user, reg

CVE-2026-73611 HIGH POC
7.6 Aug 13

File Browser versions 2.50.0 through 2.63.21 permit indefinite session persistence via expired JWT tokens when proxy aut

CVE-2025-52902 HIGH POC
7.6 Jun 26

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ

CVE-2026-73613 HIGH POC
7.2 Aug 13

Arbitrary file deletion in filebrowser before 2.63.19 allows authenticated users holding only Create permission to delet

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server 16.0 Fixed
openSUSE Tumbleweed Fixed

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