CVE-2018-20684 json
In WinSCP before 5.14 beta, due to missing validation, the scp implementation would accept arbitrary files sent by the server, potentially…
published 2019-01-10 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13231
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.8%
- EPSS 2.8% chance of exploitation in 30 days, percentile 86%
- public exploits
- 0
- none known
Summary
In WinSCP before 5.14 beta, due to missing validation, the scp implementation would accept arbitrary files sent by the server, potentially overwriting unrelated files. This affects TSCPFileSystem::SCPSink in core/ScpFileSystem.cpp.
Patch / fix
- github.com/winscp/winscp@49d876f commit
- winscp.net/tracker/1675 advisory
Exploit prediction
2.77% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/winscp/winscp/commit/49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54
patch, third-party-advisory
-
winscp.net
/tracker/1675
patch, vendor-advisory
-
winscp.net
/eng/docs/history
release-notes, vendor-advisory
-
securityfocus.com
/bid/106526
vdb-entry, third-party-advisory
-
sintonen.fi
/advisories/scp-client-multiple-vulnerabilities.txt
mitigation, third-party-advisory
- oracle.com /security-alerts/cpujan2020.html
Sources
- CVE List CVE-2018-20684
- NVD CVE-2018-20684
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