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NVD / CVE Program· CNA GitHub_M

CVE-2026-25889: File Browser has an Authentication Bypass in User Password Update

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.36% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: filebrowser filebrowser 2.57.1.

Low priority for now. Upgrade to filebrowser filebrowser 2.57.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, a case-sensitivity flaw in the password validation logic allows any authenticated user to change their password (or an admin to change any user's password) without providing the current password. By using Title Case field name "Password" instead of lowercase "password" in the API request, the current_password verification is completely bypassed. This enables account takeover if an attacker obtains a valid JWT token through XSS, session hijacking, or other means. This vulnerability is fixed in 2.57.1.

MediumCVSS 5.4 · v3.1—No exploit Fix available
Published
Feb 9, 2026
Updated
Jun 17, 2026
EPSS
0.3% · 30th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
5.4
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
filebrowserfilebrowser

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • filebrowser filebrowserbefore 2.57.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • filebrowser filebrowser

    • < 2.57.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/filebrowser/filebrowserfrom 0—
Gogithub.com/filebrowser/filebrowser/v2before 2.57.12.57.1

Same product

filebrowser: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-32760File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin
    40Plan
  • CVE-2026-34528File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution
    39Monitor
  • CVE-2026-72839filebrowser through 2.63.16 Privilege Escalation via Signup
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-64523Nov 12, 2025 · FileBrowser has Insecure Direct Object Reference (IDOR) in Share Deletion Function
    28Monitor
  • ← EarlierCVE-2026-23849Jan 19, 2026 · File Browser vulnerable to Username Enumeration via Timing Attack in /api/login
    21Monitor
  • Later →CVE-2026-25890Feb 9, 2026 · File Browser has a Path-Based Access Control Bypass via Multiple Leading Slashes in URL
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
filebrowser filebrowser2.57.1 · descriptionVendor (CNA)
Go:github.com/filebrowser/filebrowser/v22.57.1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-72836186 days apartFileBrowser before 2.63.19 Case Sensitivity Authentication Bypass
    36Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-3558557 days apartFile Browser has a Command Injection via Hook Runner
    31Monitor
  • CVE-2026-2849224 days apartFile Browser: Path Traversal in Public Share Links Exposes Files Outside Shared Directory
    28Monitor
  • CVE-2026-3275838 days apartFile Browser has an Access Rule Bypass via Path Traversal in Copy/Rename Destination Parameter
    26Monitor
  • CVE-2026-3275938 days apartFile Browser TUS Negative Upload-Length Fires Post-Upload Hooks Prematurely
    22Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-178 · Improper Handling of Case Sensitivity

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records