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Vulnerability in CKEditor's File Uploader functionality through Unicode obfuscation

Moderate
valadas published GHSA-cgqj-mw4m-v7hp Sep 23, 2025

Package

DNNConnect.CKE

Affected versions

<10.1.0

Patched versions

10.1.0

Description

Summary

The CKEditor file upload endpoint has insufficient sanitization for filenames allowing probing network endpoints.

Description

A specially crafted request can be made to upload a file with some Unicode characters that will be translated into a path that could expose resources that are in the internal network of the hosted site.

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVE ID

CVE-2025-59547

Weaknesses

No CWEs

Credits