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Fencer Intel
medium 6.1

CVE-2009-5065 json

feedparser Cross-site Scripting vulnerability

published 15y ago modified 4mo ago also GHSA-3mwg-gp5g-fv3q , PYSEC-2011-18 , EUVD-2011-0013

cvss
6.1
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
1
Exploit-DB

Summary

Cross-site scripting (XSS) vulnerability in feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) before 5.0 allows remote attackers to inject arbitrary web script or HTML via vectors involving nested CDATA stanzas.

Patch / fix

  • pypi feedparser 5.0
  • feedparser Debian 14, Debian 13, Debian 12 5.0.1-1

debian advisories DEBIAN-CVE-2009-5065

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-5065 updated cvss 4.3

python-feedparser: multiple flaws corrected in version 5.0.1

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-35570)
  2. Published

Exploit prediction

4.53% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35570 python-feedparser 5.0 - '/feedparser/feedparser.py' Cross-Site Scripting remote, 2011-04-05
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=684877 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.novell.com https://bugzilla.novell.com/show_bug.cgi?id=680074 referenced PoC, tagged "exploit" by a source, unverified
  • code.google.com http://code.google.com/p/feedparser/issues/detail?id=195 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi feedparser
<5.0
5.0

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.