{"id":"CVE-2020-27783","state":"PUBLISHED","title":"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 t","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.","publishedAt":"2020-12-03T16:39:41.000Z","updatedAt":"2025-12-17T21:02:06.822Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"redhat","products":["n/a python-lxml"],"affected":[{"vendor":"n/a","product":"python-lxml","versions":[{"version":"lxml-4.6.2","status":"affected"}]}],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1901633","https://www.debian.org/security/2020/dsa-4810","https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/","https://www.oracle.com//security-alerts/cpujul2021.html","https://advisory.checkmarx.net/advisory/CX-2020-4286","https://security.netapp.com/advisory/ntap-20210521-0003/"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T19:47:11.046Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/27xxx/CVE-2020-27783.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2020-27783","state":"PUBLISHED","datePublished":"2020-12-03T16:39:41.000Z","dateUpdated":"2025-12-17T21:02:06.822Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2020-10-27T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"n/a","product":"python-lxml","versions":[{"version":"lxml-4.6.2","status":"affected"}]}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","tags":["x_refsource_MISC"]},{"url":"https://www.debian.org/security/2020/dsa-4810","name":"DSA-4810","tags":["vendor-advisory","x_refsource_DEBIAN"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html","name":"[debian-lts-announce] 20201218 [SECURITY] [DLA 2467-2] lxml regression update","tags":["mailing-list","x_refsource_MLIST"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/","name":"FEDORA-2020-0e055ea503","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/","name":"FEDORA-2020-307946cfb6","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","tags":["x_refsource_MISC"]},{"url":"https://advisory.checkmarx.net/advisory/CX-2020-4286","tags":["x_refsource_MISC"]},{"url":"https://security.netapp.com/advisory/ntap-20210521-0003/","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","dateUpdated":"2021-07-20T22:54:48.000Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secalert@redhat.com","ID":"CVE-2020-27783","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"python-lxml","version":{"version_data":[{"version_value":"lxml-4.6.2"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79"}]}]},"references":{"reference_data":[{"name":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","refsource":"MISC","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633"},{"name":"DSA-4810","refsource":"DEBIAN","url":"https://www.debian.org/security/2020/dsa-4810"},{"name":"[debian-lts-announce] 20201218 [SECURITY] [DLA 2467-2] lxml regression update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html"},{"name":"FEDORA-2020-0e055ea503","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/"},{"name":"FEDORA-2020-307946cfb6","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/"},{"name":"https://www.oracle.com//security-alerts/cpujul2021.html","refsource":"MISC","url":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"name":"https://advisory.checkmarx.net/advisory/CX-2020-4286","refsource":"MISC","url":"https://advisory.checkmarx.net/advisory/CX-2020-4286"},{"name":"https://security.netapp.com/advisory/ntap-20210521-0003/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20210521-0003/"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901633","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.debian.org/security/2020/dsa-4810","name":"DSA-4810","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html","name":"[debian-lts-announce] 20201218 [SECURITY] [DLA 2467-2] lxml regression update","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/","name":"FEDORA-2020-0e055ea503","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/","name":"FEDORA-2020-307946cfb6","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://advisory.checkmarx.net/advisory/CX-2020-4286","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20210521-0003/","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T16:25:42.427Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":6.1,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-12-17T21:02:01.991144Z","id":"CVE-2020-27783","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-17T21:02:06.822Z"}}]}}}