CVE-2014-3146: lxml Cross-site Scripting Via Control Characters

CVE-2014-3146 · Severity: low · CVSS 3.1 · Published 2014-05-14

Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

Technologies: lxml (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2014-3146 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2014-3146 being exploited in the wild.
How severe is CVE-2014-3146?
Low severity, with a CVSS score of 3.1, published 14 May 2014.
Which products and versions are affected?
lxml (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.5.
Is there a fix for CVE-2014-3146?
Yes. lxml (PyPI): upgrade to 3.3.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2014-3146?
Check whether you run lxml (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • lxml (PyPI): upgrade to 3.3.5 or later
    pip install "lxml>=3.3.5"

Affected products

  • lxml (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.5

Identifiers

  • CVE-2014-3146
  • GHSA-57qw-cc2g-pv5p
  • PYSEC-2014-9

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