View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2012-6453 medium priority: Ubuntu including 1 source packages (mediawiki-extensions), 15 status rows across 15 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 5, not-affected 5, DNE 4, released 1.
Cross-site scripting (XSS) vulnerability in the RSS Reader extension before 0.2.6 for MediaWiki allows remote attackers to inject arbitrary web script or HTML via a crafted feed.