CVE-2023-6208

Mozilla: Using Selection API would copy contents into X11 primary selection.

Loading…

Severity

Moderate

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · November 21, 2023

Updated · November 22, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as:

When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard.

This bug only affects Firefox on X11. Other systems are unaffected.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-1021 · Improper Restriction of Rendered UI Layers or Frames