CVE-2019-16935

Name: CVE-2019-16935
Creator: NVD / NIST
Published: 2019-09-28T02:15:10.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 4.65%

Last modified Jun 17, 2026

CVE-2019-16935 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 4.65% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

4.65%

90.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Python	Python	>= 2.7.0, < 2.7.17
Python	Python	>= 3.0.0, < 3.5.8
Python	Python	>= 3.6.0, < 3.6.10
Python	Python	>= 3.7.0, < 3.7.5
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.04

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlMailing List, Third Party Advisory
https://bugs.python.org/issue38243Exploit, Vendor Advisory
https://github.com/python/cpython/blob/35c0809158be7feae4c4f877a08b93baea2d8291/Lib/xmlrpc/server.py#L897Third Party Advisory
https://github.com/python/cpython/blob/e007860b8b3609ce0bc62b1780efaa06241520bd/Lib/DocXMLRPCServer.py#L213Third Party Advisory
https://github.com/python/cpython/pull/16373Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/
https://security.netapp.com/advisory/ntap-20191017-0004/Third Party Advisory
https://usn.ubuntu.com/4151-1/Third Party Advisory
https://usn.ubuntu.com/4151-2/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlMailing List, Third Party Advisory
https://bugs.python.org/issue38243Exploit, Vendor Advisory
https://github.com/python/cpython/blob/35c0809158be7feae4c4f877a08b93baea2d8291/Lib/xmlrpc/server.py#L897Third Party Advisory
https://github.com/python/cpython/blob/e007860b8b3609ce0bc62b1780efaa06241520bd/Lib/DocXMLRPCServer.py#L213Third Party Advisory
https://github.com/python/cpython/pull/16373Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/
https://security.netapp.com/advisory/ntap-20191017-0004/Third Party Advisory
https://usn.ubuntu.com/4151-1/Third Party Advisory
https://usn.ubuntu.com/4151-2/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory

Timeline

Published: Sep 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16935?

How severe is CVE-2019-16935?

CVE-2019-16935 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 4.65% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16935?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16935?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST