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    CVE-2014-3146

    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.

    Published:Apr 15, 2014
    Last Modified:Dec 17, 2025
    EPS:May 14, 2014
    EPSS Score:0.06204
    CVSS Score:6.1

    Affected Products

    Vendor
    Lxml
    Product
    Lxml

    Exploits

    http://seclists.org/fulldisclosure/2014/Apr/319http://www.securityfocus.com/bid/67159https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.htmlhttp://seclists.org/fulldisclosure/2014/Apr/319http://www.securityfocus.com/bid/67159https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.htmlhttps://www.exploit-db.com/exploits/39155

    Related CVEs

    CVE-2026-49825 (CVSS 8.2) — lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxm…
    CVE-2026-41066 (CVSS 7.5) — lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two …
    CVE-2024-37388 (CVSS 9.1) — An XML External Entity (XXE) vulnerability in the ebookmeta.get_metadata function of lxml before v4.9.1 allows…
    CVE-2022-2309 (CVSS 7.5) — NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only appli…
    CVE-2021-43818 (CVSS 8.2) — lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner…
    CVE-2021-28957 (CVSS 6.1) — An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the sa…
    CVE-2020-27783 (CVSS 6.1) — A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate …
    CVE-2018-19787 (CVSS 6.1) — An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove…

    References

    http://advisories.mageia.org/MGASA-2014-0218.html
    http://lists.opensuse.org/opensuse-updates/2014-05/msg00083.html
    http://lxml.de/3.3/changes-3.3.5.html
    http://seclists.org/fulldisclosure/2014/Apr/210
    http://seclists.org/fulldisclosure/2014/Apr/319
    http://secunia.com/advisories/58013
    http://secunia.com/advisories/58744
    http://secunia.com/advisories/59008
    http://www.debian.org/security/2014/dsa-2941
    http://www.mandriva.com/security/advisories?name=MDVSA-2015:112
    http://www.openwall.com/lists/oss-security/2014/05/09/7
    http://www.securityfocus.com/bid/67159
    http://www.ubuntu.com/usn/USN-2217-1
    https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.html
    http://advisories.mageia.org/MGASA-2014-0218.html
    http://lists.opensuse.org/opensuse-updates/2014-05/msg00083.html
    http://lxml.de/3.3/changes-3.3.5.html
    http://seclists.org/fulldisclosure/2014/Apr/210
    http://seclists.org/fulldisclosure/2014/Apr/319
    http://secunia.com/advisories/58013
    http://secunia.com/advisories/58744
    http://secunia.com/advisories/59008
    http://www.debian.org/security/2014/dsa-2941
    http://www.mandriva.com/security/advisories?name=MDVSA-2015:112
    http://www.openwall.com/lists/oss-security/2014/05/09/7
    http://www.securityfocus.com/bid/67159
    http://www.ubuntu.com/usn/USN-2217-1
    https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High