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CVE-2011-1156

18
FAUCET Score

CVE-2011-1156 describes a denial-of-service vulnerability in Universal Feed Parser (feedparser.py) versions prior to 5.0.1, allowing remote attackers to crash applications by supplying a malformed DOCTYPE declaration. With a CVSS score of 5.0, this vulnerability has a low attack complexity and requires no authentication, but its impact is limited to application availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, indicating a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.0CPE matchmatch criteria
cpe:2.3:a:mark_pilgrim:feedparser:*:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:mark_pilgrim:feedparser:3.0:*:*:*:*:*:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:mark_pilgrim:feedparser:3.0.1:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:a:mark_pilgrim:feedparser:3.1:*:*:*:*:*:*:*
3.2CPE matchmatch criteria
cpe:2.3:a:mark_pilgrim:feedparser:3.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.26%
Probability of exploitation in next 30 days
EPSS Percentile
87.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0326 is in the 82nd percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: feedparserFixed in: 5.0.1

Vendor Advisories (1)

pipGHSA-6h52-4vmh-8x4fhigh

feedparser denial of service vulnerability

Jul 23, 2018

References

lists.opensuse.org / opensuse-updates/2011-04/msg00026.html
openwall.com / lists/oss-security/2011/03/14/18
Patch
openwall.com / lists/oss-security/2011/03/15/11
ExploitPatch
bugzilla.novell.com / show_bug.cgi
ExploitPatch
bugzilla.redhat.com / show_bug.cgi
code.google.com / p/feedparser/issues/detail
ExploitPatch
secunia.com / advisories/43730
Vendor Advisory
secunia.com / advisories/44074
Vendor Advisory
support.novell.com / security/cve/CVE-2011-1156.html
mandriva.com / security/advisories
securityfocus.com / bid/46867