CVE-2020-8634

Name: CVE-2020-8634
Creator: NVD / NIST
Published: 2020-03-07T00:15:13.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2020-8634 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Wing FTP Server v6.2.3 for Linux, macOS, and Solaris sets insecure permissions on files modified within the HTTP file management interface, resulting in files being saved with world-readable and world-writable permissions. If a sensitive system file were edited this way, a low-privilege user may escalate privileges to root.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

Wing FTP Server v6.2.3 for Linux, macOS, and Solaris sets insecure permissions on files modified within the HTTP file management interface, resulting in files being saved with world-readable and world-writable permissions. If a sensitive system file were edited this way, a low-privilege user may escalate privileges to root.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.43%

34.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-281

Affected Software

Vendor	Product	Versions
Wftpserver	Wing Ftp Server	6.2.3

References

https://www.hooperlabs.xyz/disclosures/cve-2020-8635.phpExploit, Third Party Advisory
https://www.hooperlabs.xyz/disclosures/cve-2020-8635.phpExploit, Third Party Advisory

Timeline

Published: Mar 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8634?

How severe is CVE-2020-8634?

CVE-2020-8634 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8634?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8634?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST