CVE-2009-5065

feedparser < 5.0 - Cross-Site Scripting via Nested CDATA Stanzas

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-5065. PoCs published by fazalmajid.

AI-analyzed exploit summary This exploit demonstrates a cross-site scripting (XSS) vulnerability in python-feedparser due to improper sanitization of nested CDATA sections in RSS feeds. The PoC shows how malicious script code can be embedded within nested CDATA sections, which may execute in the context of the affected site.

Description

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by fazalmajid · textremotemultiple
https://www.exploit-db.com/exploits/35570

This exploit demonstrates a cross-site scripting (XSS) vulnerability in python-feedparser due to improper sanitization of nested CDATA sections in RSS feeds. The PoC shows how malicious script code can be embedded within nested CDATA sections, which may execute in the context of the affected site.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: python-feedparser
No auth needed
Prerequisites: A vulnerable version of python-feedparser · A user accessing a malicious RSS feed
MITRE ATT&CK
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (8)

Core 8
Core References
Vendor Advisory vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2011:082
Vendor Advisory x_refsource_confirm
http://support.novell.com/security/cve/CVE-2009-5065.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/47177
Exploit, Patch x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=684877
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/44074
Mailing List mailing-list x_refsource_mlist
http://lists.opensuse.org/opensuse-updates/2011-04/msg00026.html
Exploit, Patch x_refsource_confirm
https://bugzilla.novell.com/show_bug.cgi?id=680074

Scores

EPSS 0.0453
EPSS Percentile 90.4%

Details

CWE
CWE-79
Status published
Products (10)
mark_pilgrim/feedparser 3.0
mark_pilgrim/feedparser 3.0.1
mark_pilgrim/feedparser 3.1
mark_pilgrim/feedparser 3.2
mark_pilgrim/feedparser 3.3
mark_pilgrim/feedparser 4.0
mark_pilgrim/feedparser 4.0.1
mark_pilgrim/feedparser 4.0.2
mark_pilgrim/feedparser < 4.1
pypi/feedparser 0 - 5.0PyPI
Published Apr 11, 2011
Tracked Since Feb 18, 2026