CVE-2023-6317: A prompt bypass exists in the secondscreen.gateway service running on webOS version 4 through 7

This week

HIGH 7.2REMOTEMITIGATE

CVE-2023-6317 is a high-severity flaw (CVSS 7.2) affecting webos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A prompt bypass exists in the secondscreen.gateway service running on webOS version 4 through 7. An attacker can create a privileged account without asking the user for the security PIN. Full versions and TV models affected: webOS 4.9.7 - 5.30.40 running on LG43UM7000PLA webOS 5.5.0 - 04.50.51 running on OLED55CXPUA webOS 6.3.3-442 (kisscurl-kinglake) - 03.36.50 running on OLED48C1PUB webOS 7.3.1-43 (mullet-mebin) - 03.33.85 running on OLE

Why this priority

High severity
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	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-639
Published	2024-04-09
Last modified	2026-06-17

Publisher (CNA): Bitdefender · Vendor: lg

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

Am I affected?

Timeline

2024-04-09 14:15 UTCPublished CVE record published
2026-06-17 06:50 UTCUpdated Record last modified

lg webos MITIGATE

Affected: 4.9.7 · 5.5.0 · 6.3.3-442 · 7.3.1-43

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.9.7

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2023-6317?

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

Is CVE-2023-6317 being exploited?

CVE-2023-6317 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-2023-6317 affect?

CVE-2023-6317 affects webos. Severity is high (CVSS 7.2). A prompt bypass exists in the secondscreen.gateway service running on webOS version 4 through 7. An attacker can create a privileged account without asking the user for the security PIN. Full versions and TV models affected: webOS 4.9.7

How urgent is CVE-2023-6317?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-6320 CRITICAL 9.1 MITIGATE A command injection vulnerability exists in the com.webos.service.connectionmanager/tv/setVlanStaticAddress en
CVE-2023-6319 CRITICAL 9.1 MITIGATE A command injection vulnerability exists in the getAudioMetadata method from the com.webos.service.attachedsto
CVE-2023-6318 CRITICAL 9.1 MITIGATE A command injection vulnerability exists in the processAnalyticsReport method from the com.webos.service.cloud

References

← Back to latest CVEs