CVE-2018-5172: Canonical Ubuntu Linux

Medium severity, CVSS 4.3. EPSS: 1.6% chance of exploitation in the next 30 days.

The Live Bookmarks page and the PDF viewer can run injected script content if a user pastes script from the clipboard into them while viewing RSS feeds or PDF files. This could allow a malicious site to socially engineer a user to copy and paste malicious script content that could then run with the context of either page but does not allow for privilege escalation. This vulnerability affects Firefox < 60.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only; version 18.04 only
• Mozilla Firefox: before 60.0 (fixed in 60.0)

Published 2018-06-11. Last modified 2026-06-17.