CVE-2009-0942: Apple Mac OS X

Medium severity, CVSS 6.8. EPSS: 4.2% chance of exploitation in the next 30 days.

Help Viewer in Apple Mac OS X 10.4.11 and 10.5 before 10.5.7 does not verify that certain Cascading Style Sheets (CSS) are located in a registered help book, which allows remote attackers to execute arbitrary code via a help: URL that triggers invocation of AppleScript files.

Affected products

• Apple Mac OS X: version 10.4.11 only; version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; …
• Apple Mac OS X Server: version 10.4.11 only; version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; …

Published 2009-05-13. Last modified 2026-06-16.