{"api_version":"1","generated_at":"2026-04-22T20:52:18+00:00","cve":"CVE-2020-27783","urls":{"html":"https://cve.report/CVE-2020-27783","api":"https://cve.report/api/cve/CVE-2020-27783.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-27783","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-27783"},"summary":{"title":"CVE-2020-27783","description":"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.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2020-12-03 17:15:00","updated_at":"2023-11-07 03:21:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","refsource":"MISC","tags":["Exploit","Issue Tracking","Patch","Third Party Advisory"],"title":"1901633 – (CVE-2020-27783) CVE-2020-27783 python-lxml: mXSS due to the use of improper parser","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/","name":"FEDORA-2020-307946cfb6","refsource":"","tags":[],"title":"[SECURITY] Fedora 32 Update: python-lxml-4.4.1-5.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://advisory.checkmarx.net/advisory/CX-2020-4286","name":"https://advisory.checkmarx.net/advisory/CX-2020-4286","refsource":"MISC","tags":[],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.debian.org/security/2020/dsa-4810","name":"DSA-4810","refsource":"DEBIAN","tags":[],"title":"Debian -- Security Information -- DSA-4810-1 lxml","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/","name":"FEDORA-2020-0e055ea503","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: python-lxml-4.5.1-3.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","name":"N/A","refsource":"N/A","tags":[],"title":"Oracle Critical Patch Update Advisory - July 2021","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html","name":"[debian-lts-announce] 20201218 [SECURITY] [DLA 2467-2] lxml regression update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2467-2] lxml regression update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://security.netapp.com/advisory/ntap-20210521-0003/","name":"https://security.netapp.com/advisory/ntap-20210521-0003/","refsource":"CONFIRM","tags":[],"title":"CVE-2020-27783 lxml Vulnerability in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/","name":"FEDORA-2020-307946cfb6","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 32 Update: python-lxml-4.4.1-5.fc32 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/","name":"FEDORA-2020-0e055ea503","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 33 Update: python-lxml-4.5.1-3.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27783","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27783","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"32","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"lxml","cpe5":"lxml","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"lxml","cpe5":"lxml","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"netapp","cpe5":"snapcenter","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"oracle","cpe5":"communications_offline_mediation_controller","cpe6":"12.0.0.3.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"oracle","cpe5":"zfs_storage_appliance_kit","cpe6":"8.8","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"redhat","cpe5":"software_collections","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"27783","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"redhat","cpe5":"software_collections","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-27783","qid":"159227","title":"Oracle Enterprise Linux Security Update for python-lxml (ELSA-2021-1898)"},{"cve":"CVE-2020-27783","qid":"159342","title":"Oracle Enterprise Linux Security Update for python27:2.7 (ELSA-2021-1761)"},{"cve":"CVE-2020-27783","qid":"159460","title":"Oracle Enterprise Linux Security Update for python38:3.8 (ELSA-2021-1879)"},{"cve":"CVE-2020-27783","qid":"159768","title":"Oracle Enterprise Linux Security Update for ol-automation-manager (ELSA-2022-9341)"},{"cve":"CVE-2020-27783","qid":"239289","title":"Red Hat Update for python-lxml (RHSA-2021:1898)"},{"cve":"CVE-2020-27783","qid":"239292","title":"Red Hat Update for python38:3.8 (RHSA-2021:1879)"},{"cve":"CVE-2020-27783","qid":"239307","title":"Red Hat Update for python27:2.7 (RHSA-2021:1761)"},{"cve":"CVE-2020-27783","qid":"239580","title":"Red Hat Update for rh-python38 (RHSA-2021:3254)"},{"cve":"CVE-2020-27783","qid":"296069","title":"Oracle Solaris 11.4 Support Repository Update (SRU) 31.88.5 Missing (CPUJAN2021)"},{"cve":"CVE-2020-27783","qid":"352388","title":"Amazon Linux Security Advisory for python-lxml: ALAS2-2021-1666"},{"cve":"CVE-2020-27783","qid":"354846","title":"Amazon Linux Security Advisory for python-lxml : ALAS-2023-1709"},{"cve":"CVE-2020-27783","qid":"377332","title":"Alibaba Cloud Linux Security Update for python-lxml (ALINUX3-SA-2022:0086)"},{"cve":"CVE-2020-27783","qid":"377557","title":"Alibaba Cloud Linux Security Update for python27:2.7 (ALINUX3-SA-2022:0112)"},{"cve":"CVE-2020-27783","qid":"501364","title":"Alpine Linux Security Update for py3-lxml"},{"cve":"CVE-2020-27783","qid":"501679","title":"Alpine Linux Security Update for py3-lxml"},{"cve":"CVE-2020-27783","qid":"504329","title":"Alpine Linux Security Update for py3-lxml"},{"cve":"CVE-2020-27783","qid":"670202","title":"EulerOS Security Update for python-lxml (EulerOS-SA-2021-1701)"},{"cve":"CVE-2020-27783","qid":"670237","title":"EulerOS Security Update for python-lxml (EulerOS-SA-2021-1839)"},{"cve":"CVE-2020-27783","qid":"670673","title":"EulerOS Security Update for python-lxml (EulerOS-SA-2021-2431)"},{"cve":"CVE-2020-27783","qid":"751854","title":"SUSE Enterprise Linux Security Update for python-lxml (SUSE-SU-2022:0803-1)"},{"cve":"CVE-2020-27783","qid":"751858","title":"OpenSUSE Security Update for python-lxml (openSUSE-SU-2022:0803-1)"},{"cve":"CVE-2020-27783","qid":"751901","title":"SUSE Enterprise Linux Security Update for python-lxml (SUSE-SU-2022:0895-1)"},{"cve":"CVE-2020-27783","qid":"752637","title":"SUSE Enterprise Linux Security Update for python3-lxml (SUSE-SU-2022:3461-1)"},{"cve":"CVE-2020-27783","qid":"900214","title":"CBL-Mariner Linux Security Update for python-lxml 4.2.4"},{"cve":"CVE-2020-27783","qid":"901809","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for python-lxml (6807-1)"},{"cve":"CVE-2020-27783","qid":"903431","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for python-lxml (4681)"},{"cve":"CVE-2020-27783","qid":"940287","title":"AlmaLinux Security Update for python38:3.8 (ALSA-2021:1879)"},{"cve":"CVE-2020-27783","qid":"940311","title":"AlmaLinux Security Update for python27:2.7 (ALSA-2021:1761)"},{"cve":"CVE-2020-27783","qid":"960385","title":"Rocky Linux Security Update for python38:3.8 (RLSA-2021:1879)"},{"cve":"CVE-2020-27783","qid":"960420","title":"Rocky Linux Security Update for python27:2.7 (RLSA-2021:1761)"},{"cve":"CVE-2020-27783","qid":"960873","title":"Rocky Linux Security Update for python-lxml (RLSA-2021:1898)"},{"cve":"CVE-2020-27783","qid":"982397","title":"Python (pip) Security Update for lxml (GHSA-pgww-xf46-h92r)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-27783","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"python-lxml","version":{"version_data":[{"version_value":"lxml-4.6.2"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633"},{"refsource":"DEBIAN","name":"DSA-4810","url":"https://www.debian.org/security/2020/dsa-4810"},{"refsource":"MLIST","name":"[debian-lts-announce] 20201218 [SECURITY] [DLA 2467-2] lxml regression update","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html"},{"refsource":"FEDORA","name":"FEDORA-2020-0e055ea503","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/"},{"refsource":"FEDORA","name":"FEDORA-2020-307946cfb6","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","refsource":"MISC","name":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"refsource":"MISC","name":"https://advisory.checkmarx.net/advisory/CX-2020-4286","url":"https://advisory.checkmarx.net/advisory/CX-2020-4286"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20210521-0003/","url":"https://security.netapp.com/advisory/ntap-20210521-0003/"}]},"description":{"description_data":[{"lang":"eng","value":"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."}]}},"nvd":{"publishedDate":"2020-12-03 17:15:00","lastModifiedDate":"2023-11-07 03:21:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*","versionStartIncluding":"1.2","versionEndExcluding":"4.6.2","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:oracle:communications_offline_mediation_controller:12.0.0.3.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"27783","Ordinal":"189519","Title":"CVE-2020-27783","CVE":"CVE-2020-27783","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"27783","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"27783","Ordinal":"2","NoteData":"2020-12-03","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"27783","Ordinal":"3","NoteData":"2021-07-20","Type":"Other","Title":"Modified"}]}}}