How severe is CVE-2019-12143?

CVE-2019-12143 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-12143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12143?

CVE-2019-12143 affects Progress Ws Ftp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12143?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-12143 published?

CVE-2019-12143 was published on 2019-06-11 and last updated on 2026-06-17.

CVE-2019-12143

CVE-2019-12143 is a medium-severity vulnerability in Progress Ws Ftp Server with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Progress Ws Ftp Server
Published: 2019-06-11
Last modified: 2026-06-17

Description

A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. An attacker can supply a string using special patterns via the SCP protocol to disclose WS_FTP usernames as well as filenames.

Frequently asked questions

What is CVE-2019-12143?: A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. An attacker can supply a string using special patterns via the SCP protocol to disclose WS_FTP usernames as well as filenames.
How severe is CVE-2019-12143?: CVE-2019-12143 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-12143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12143?: CVE-2019-12143 affects Progress Ws Ftp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-12143 published?: CVE-2019-12143 was published on 2019-06-11 and last updated on 2026-06-17.

References

https://docs.ipswitch.com/WS_FTP_Server2018/ReleaseNotes/index.htm#49242.htm

Affected products (1)

cpe:2.3:a:progress:ws_ftp_server:*:*:*:*:*:*:*:*

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