Path Traversal in Sync-In Server
CVE-2025-56869
Directory traversal vulnerability in Sync In server thru 1.1.1 allowing authenticated attackers to gain read and write access to the system via FilesManager.saveMultipart function in backend/src/applications/files/services/files-manager.service.ts, and FilesManager.compress function in backend/src/applications/files/services/files-manager.service.ts.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sync-in.com/ (Product)
- github.com/Sync-in/server (Product)
- github.com/Sync-in/server/releases/tag/v1.2.0 (Release Notes)
Frequently asked questions
- What is CVE-2025-56869?
- CVE-2025-56869 is a medium-severity vulnerability in Sync-In Server, classified under Path Traversal. CVSS score: 5.3/10. Published 2025-09-19.
- How severe is CVE-2025-56869?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-56869 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.