CVE-2016-20023: cksource ckfinder Relative Path Traversal
CVSS: 6.5v3.1MediumAnalyzed
Published 05-12-2025Last modified 05-12-2025
Vulnerability summary
CVE-2016-20023 is a medium (CVSS 6.5) Relative Path Traversal vulnerability in cksource ckfinder. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.4% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
0.34%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-12-2025PublishedVulnerability first disclosed.
- 05-12-2025Last modifiedVulnerability information updated.
Description
In CKSource CKFinder before 2.5.0.1 for ASP.NET, authenticated users could download any file from the server if the correct path to a file was provided.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NSources2 sources · 5.0–6.5
- CVE.orgCNA5.0MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
26%
Versus all other CVEs
30-day change
0.00 pp
From 0.34% on 20-09-2026
20-09-202620-10-2026
EPSS score0.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-23Relative Path TraversalThe product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Affected systems
Cksource1 product
- ckfinder≥ 2, < 2.5.0.1 | < 2.5.0.1
1 vendor · 1 product
References
2 links- ckeditor.com/ckfinder/release-notes/Release Notes