--- id: CVE-2019-16935 title: >- The documentation XML-RPC server in Python through 2.7.16, 3.x through 3.6.9, and 3.7.x through 3.7.4 has XSS via the server_title field summary: >- The documentation XML-RPC server in Python through 2.7.16, 3.x through 3.6.9, and 3.7.x through 3.7.4 has XSS via the server_title field. This occurs in Lib/DocXMLRPCServer.py in Python 2.x, and in Lib/xmlrpc/server.py in Python 3.x. If … severity: medium cvss: 6.1 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N' cwe: - CWE-79 vendor: python product: python affected: - 'python >= 2.7.0, < 2.7.17' - 'python >= 3.0.0, < 3.5.8' - 'python >= 3.6.0, < 3.6.10' - 'python >= 3.7.0, < 3.7.5' - debian_linux = 9.0 - ubuntu_linux = 12.04 - ubuntu_linux = 14.04 - ubuntu_linux = 16.04 - ubuntu_linux = 18.04 - ubuntu_linux = 19.04 patched: - python 3.7.5 published: '2019-09-28' updated: '2026-10-07' sourceUpdated: '2026-10-07T19:17:12.787' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-16935' references: - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.html' label: cve@mitre.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.html' label: cve@mitre.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.html' label: cve@mitre.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.html' label: cve@mitre.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html' label: cve@mitre.org - url: 'https://bugs.python.org/issue38243' label: cve@mitre.org - url: >- https://github.com/python/cpython/blob/35c0809158be7feae4c4f877a08b93baea2d8291/Lib/xmlrpc/server.py#L897 label: cve@mitre.org - url: >- https://github.com/python/cpython/blob/e007860b8b3609ce0bc62b1780efaa06241520bd/Lib/DocXMLRPCServer.py#L213 label: cve@mitre.org - url: 'https://github.com/python/cpython/pull/16373' label: cve@mitre.org - url: 'https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html' label: cve@mitre.org - url: 'https://lists.debian.org/debian-lts-announce/2021/04/msg00015.html' label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/ label: cve@mitre.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/ label: cve@mitre.org - url: 'https://security.netapp.com/advisory/ntap-20191017-0004/' label: cve@mitre.org - url: 'https://usn.ubuntu.com/4151-1/' label: cve@mitre.org - url: 'https://usn.ubuntu.com/4151-2/' label: cve@mitre.org - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: cve@mitre.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://bugs.python.org/issue38243' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://github.com/python/cpython/blob/35c0809158be7feae4c4f877a08b93baea2d8291/Lib/xmlrpc/server.py#L897 label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://github.com/python/cpython/blob/e007860b8b3609ce0bc62b1780efaa06241520bd/Lib/DocXMLRPCServer.py#L213 label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://github.com/python/cpython/pull/16373' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2021/04/msg00015.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/ label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.netapp.com/advisory/ntap-20191017-0004/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4151-1/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4151-2/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: af854a3a-2127-422b-91ae-364da2661108 tags: - nvd - cve.org epss: 0.04653 epssPercentile: 0.91482 ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-10-07T18:16:39.926699Z' ingestedAt: '2026-10-07T18:42:20.899Z' --- ## Overview The documentation XML-RPC server in Python through 2.7.16, 3.x through 3.6.9, and 3.7.x through 3.7.4 has XSS via the server_title field. This occurs in Lib/DocXMLRPCServer.py in Python 2.x, and in Lib/xmlrpc/server.py in Python 3.x. If set_server_title is called with untrusted input, arbitrary JavaScript can be delivered to clients that visit the http URL for this server. ## Affected - `python >= 2.7.0, < 2.7.17` - `python >= 3.0.0, < 3.5.8` - `python >= 3.6.0, < 3.6.10` - `python >= 3.7.0, < 3.7.5` - `debian_linux = 9.0` - `ubuntu_linux = 12.04` - `ubuntu_linux = 14.04` - `ubuntu_linux = 16.04` - `ubuntu_linux = 18.04` - `ubuntu_linux = 19.04` ## Remediation Upgrade past the affected range: - `python 3.7.5`