title: PIN/prompt bypass on the secondscreen.gateway service allows access to the SSAP API without user interaction
description: 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 OLED55A23LA
problem types: CWE-639 Authorization Bypass Through User-Controlled Key
affected:
{
defaultStatus: unaffected
product: WebOS
vendor: LG
versions:
status: affected, version:  4.9.7
status: affected, version: 5.5.0
status: affected, version: 6.3.3-442
status: affected, version: 7.3.1-43
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 7.2
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: An update to a newer firmware version fixes the issue.