CVE-2019-16198: KSLabs KSWEB 3.93 allows ../ directory traversal, as demonstrated by the hostFile parameter.

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MEDIUM 6.5DOWNGRADE

CVE-2019-16198 is a medium-severity flaw (CVSS 6.5) affecting ksweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

KSLabs KSWEB 3.93 allows ../ directory traversal, as demonstrated by the hostFile parameter.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-10-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kslabs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-10-03 21:15 UTCPublished CVE record published
2026-06-17 02:21 UTCUpdated Record last modified

kslabs ksweb DOWNGRADE

Affected: 3.93

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.93

1. Check installed version

apt-cache policy ksweb || rpm -q ksweb || ksweb --version

2. No fixed release: DOWNGRADE to a release before 3.93 (Debian / Ubuntu)

apt-cache madison ksweb sudo apt install ksweb=<VERSION_BEFORE_3.93> sudo apt-mark hold ksweb

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ksweb sudo dnf downgrade ksweb-<VERSION_BEFORE_3.93> sudo dnf versionlock add ksweb

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-16198?

ksweb: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-16198 being exploited?

CVE-2019-16198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-16198 affect?

CVE-2019-16198 affects ksweb. Severity is medium (CVSS 6.5). KSLabs KSWEB 3.93 allows ../ directory traversal, as demonstrated by the hostFile parameter.

How urgent is CVE-2019-16198?

Priority 47/100. Public exploit reference

Related CVEs

CVE-2019-15766 HIGH 8.8 DOWNGRADE The KSLABS KSWEB (aka ru.kslabs.ksweb) application 3.93 for Android allows authenticated remote code execution

References

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