CVE-2011-1158: Mark Pilgrim Feedparser

Medium severity, CVSS 4.3. EPSS: 2.3% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) 5.x before 5.0.1 allows remote attackers to inject arbitrary web script or HTML via an unexpected URI scheme, as demonstrated by a javascript: URI.

Affected products

• Mark Pilgrim Feedparser: version 5.0 only

Published 2011-04-11. Last modified 2026-06-16.