CVE-2009-3266: Opera Browser

Medium severity, CVSS 4.3. EPSS: 2.7% chance of exploitation in the next 30 days.

Opera before 10.01 does not properly restrict HTML in a (1) RSS or (2) Atom feed, which allows remote attackers to conduct cross-site scripting (XSS) attacks, and conduct cross-zone scripting attacks involving the Feed Subscription Page to read feeds or create feed subscriptions, via a crafted feed, related to the rendering of the application/rss+xml content type as "scripted content."

Affected products

• Opera Opera Browser: version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; version 6.0 only; …

Published 2009-09-18. Last modified 2026-06-16.