Path Traversal in Soniccloudorg Sonic-Server
CVE-2026-6620
A vulnerability was found in SonicCloudOrg sonic-server up to 2.0.0. The affected element is the function Upload of the file FileTool.java of the component File Upload Endpoint. The manipulation of the argument Type results in path traversal. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (40.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Soniccloudorg Sonic-Server — versions 2.0
Weakness classification (CWE)
References
- vuldb.com/vuln/358255 (technical-description, vdb-entry)
- vuldb.com/vuln/358255/cti (signature, permissions-required)
- vuldb.com/submit/792336 (third-party-advisory)
- github.com/ccccccctiiiiiiii-lab/public_exp/issues/2 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-6620?
- CVE-2026-6620 is a medium-severity vulnerability in Soniccloudorg Sonic-Server, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-04-20.
- How severe is CVE-2026-6620?
- Medium severity. CVSS v3 base score is 6.3 out of 10.