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

Timeline

Scores

EPSS (exploitation in 30 days)

1.1% · top 34% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Weakness

• CWE-639 Authorization Bypass Through User-Controlled Key (opens in a new tab)All about CWE-639 and its CVEs

Affected products

• LG · WebOS

  • affected 4.9.7
  • affected 5.5.0
  • affected 6.3.3-442
  • affected 7.3.1-43

What to do

Solution: An update to a newer firmware version fixes the issue.

References (2)

• https://bitdefender.com/blog/labs/vulnerabilities-identified-in-lg-webos/ (opens in a new tab)x_transferred
• https://lgsecurity.lge.com/bulletins/tv#updateDetails (opens in a new tab)vendor-advisoryx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-6317](https://trackcve.app/badge/CVE-2023-6317.svg)](https://trackcve.app/cve/CVE-2023-6317)

Record last updated 2 Aug 2024, 08:28 UTC.