CVE-2019-16903: Platinum UPnP SDK 1.2.0 allows Directory Traversal in Core/PltHttpServer.cpp because it checks for /.

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2019-16903 is a medium-severity flaw (CVSS 5.3) affecting platinum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Platinum UPnP SDK 1.2.0 allows Directory Traversal in Core/PltHttpServer.cpp because it checks for /.. where it should be checking for ../ instead.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-09-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: plutinosoft

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

Am I affected?

Timeline

2019-09-26 11:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

plutinosoft platinum DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison platinum sudo apt install platinum=<VERSION_BEFORE_1.2.0> sudo apt-mark hold platinum

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

dnf --showduplicates list platinum sudo dnf downgrade platinum-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add platinum

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-2019-16903?

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

Is CVE-2019-16903 being exploited?

CVE-2019-16903 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-2019-16903 affect?

CVE-2019-16903 affects platinum. Severity is medium (CVSS 5.3). Platinum UPnP SDK 1.2.0 allows Directory Traversal in Core/PltHttpServer.cpp because it checks for /.. where it should be checking for ../ instead.

How urgent is CVE-2019-16903?

Priority 48/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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