XSS in Cksource Ckfinder
CVE-2025-63830
CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a crafted SVG containing active content.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cksource Ckfinder — versions 1.4.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ckeditor.com/ckfinder/changelog/ (Product)
- github.com/Shubham03007/CVE-2025-63830/blob/main/README.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-63830?
- CVE-2025-63830 is a medium-severity vulnerability in Cksource Ckfinder, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-11-14.
- How severe is CVE-2025-63830?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2025-63830 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.