CVE-2009-3266

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-09-18 · updated 2026-06-16
Weakness: CWE-79

Description

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 Browser: 5.0, 5.0-beta2, 5.0-beta3, 5.0-beta4, 5.0-beta5, 5.0-beta6 (+99)

References

http://archives.neohapsis.com/archives/bugtraq/2009-10/0289.html
http://secunia.com/advisories/37182
http://securethoughts.com/2009/09/exploiting-chrome-and-operas-inbuilt-atomrss-reader-with-script-execution-and-more/
http://securethoughts.com/2009/10/hijacking-operas-native-page-using-malicious-rss-payloads/
http://www.opera.com/docs/changelogs/mac/1001/
http://www.opera.com/docs/changelogs/unix/1001/
http://www.opera.com/docs/changelogs/windows/1001/
http://www.opera.com/support/kb/view/939/
http://www.osvdb.org/59358
http://www.securityfocus.com/archive/1/506517/100/0/threaded
http://www.securityfocus.com/bid/36418
http://www.securityfocus.com/bid/36850

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