CVE-2011-1157

Exp

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 malformed XML comments.

Published: 2011-04-11 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1157 is rated Exploit Available (55.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.61%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1157

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-1157

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.84% 0.61% -0.24%
2 2025-03-29 0.61% 0.84% +0.24%
3 2025-03-17 — 0.61% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1157

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-1157

GitHub Security Advisory for CVE-2011-1157

GHSA-2p78-8hh6-96xc · Severity: medium · Ecosystem: pip — feedparser Cross-site Scripting vulnerability

OS Trackers for CVE-2011-1157

vendor priority summary link
debian low CVE-2011-1157 low priority: Debian including 1 source packages (feedparser), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1157
ubuntu low CVE-2011-1157 low priority: Ubuntu including 1 source packages (feedparser), 12 status rows across 12 suites (dapper, hardy, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): ignored 6, not-affected 5, released 1. https://ubuntu.com/security/CVE-2011-1157

Affected software / configurations for CVE-2011-1157

Vendor Product Version Raw CPE
mark_pilgrim feedparser 5.0 cpe:2.3:a:mark_pilgrim:feedparser:5.0:*:*:*:*:*:*:*

References for CVE-2011-1157

cvelogic Threat Intelligence