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    CVE-2020-27783

    A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.

    Published:Oct 18, 2020
    Last Modified:Dec 17, 2025
    EPS:Dec 3, 2020
    EPSS Score:0.01141
    CVSS Score:6.1

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Lxml
    Product
    Lxml
    Vendor
    Netapp
    Product
    Snapcenter
    Vendor
    Oracle
    Product
    Communications Offline Mediation Controller
    Vendor
    Oracle
    Product
    Zfs Storage Appliance Kit
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Software Collections
    Vendor
    Redhat
    Product
    Software Collections

    Exploits

    https://advisory.checkmarx.net/advisory/CX-2020-4286https://bugzilla.redhat.com/show_bug.cgi?id=1901633https://advisory.checkmarx.net/advisory/CX-2020-4286https://bugzilla.redhat.com/show_bug.cgi?id=1901633

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    References

    https://advisory.checkmarx.net/advisory/CX-2020-4286
    https://bugzilla.redhat.com/show_bug.cgi?id=1901633
    https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/
    https://security.netapp.com/advisory/ntap-20210521-0003/
    https://www.debian.org/security/2020/dsa-4810
    https://www.oracle.com//security-alerts/cpujul2021.html
    https://advisory.checkmarx.net/advisory/CX-2020-4286
    https://bugzilla.redhat.com/show_bug.cgi?id=1901633
    https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/
    https://security.netapp.com/advisory/ntap-20210521-0003/
    https://www.debian.org/security/2020/dsa-4810
    https://www.oracle.com//security-alerts/cpujul2021.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