HIGH
feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) before 5.0.1 allows remote attackers to cause a denial of service (application crash) via a malformed DOCTYPE declaration
Published Apr 11, 2011
8.7
HIGHCVSS 4.0
EPSS 3.26%
Description
feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) before 5.0.1 allows remote attackers to cause a denial of service (application crash) via a malformed DOCTYPE declaration.
Affected products
No data.
OR
- ≤ 5.0
- 3.0
- 3.0.1
- 3.1
- 3.2
- 3.3
- 4.0
- 4.0.1
- 4.0.2
- 4.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
8.7 HIGH GHSA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality None
Vulnerable System Integrity None
Vulnerable System Availability High
Subsequent System Confidentiality None
Subsequent System Integrity None
Subsequent System Availability None
7.5 HIGH GHSA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.26% 0.03261
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03261
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.26% (0.03261) | 87.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.23% (0.03233) | 86.60th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.42% (0.02418) | 83.67th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.90% (0.03904) | 80.18th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.42% (0.02418) | 84.02th | v4 (v2025.03.14) |
| Dec 17, 2024 | 5.61% (0.05612) | 93.18th | v3 (v2023.03.01) |
| Oct 20, 2024 | 4.18% (0.04185) | 92.41th | v3 (v2023.03.01) |
| Apr 30, 2023 | 5.93% (0.05927) | 92.32th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.84% (0.05842) | 92.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
Weaknesses (2)
References (16)
- http://lists.opensuse.org/opensuse-updates/2011-04/msg00026.html mailing-listx_refsource_MLIST
- http://openwall.com/lists/oss-security/2011/03/14/18 mailing-listx_refsource_MLISTPatch
- http://openwall.com/lists/oss-security/2011/03/15/11 mailing-listx_refsource_MLISTExploitPatch
- http://secunia.com/advisories/43730 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44074 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://support.novell.com/security/cve/CVE-2011-1156.html x_refsource_CONFIRM
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:082 vendor-advisoryx_refsource_MANDRIVA
- http://www.securityfocus.com/bid/46867 vdb-entryx_refsource_BID
- https://bugzilla.novell.com/show_bug.cgi?id=680074 x_refsource_CONFIRMExploitPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=684877 x_refsource_CONFIRM
- https://code.google.com/p/feedparser/issues/detail?id=91 x_refsource_CONFIRMExploitPatch
- https://github.com/advisories/GHSA-6h52-4vmh-8x4f Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/feedparser/PYSEC-2011-19.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2011-1156
- https://web.archive.org/web/20150523054015/http://www.mandriva.com/en/support/security/advisories/advisory/MDVSA-2011:082/?name=MDVSA-2011:082
- https://web.archive.org/web/20210121212051/https://www.securityfocus.com/bid/46867
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Apr 11, 2011
Updated Aug 6, 2024
Reserved Mar 3, 2011
Link CVE-2011-1156
CISA Vulnrichment
GHSA-6H52-4VMH-8X4F Updated n/a