CVE-2020-11888

Published: Apr 20, 2020Modified: Jun 17, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: NVD

Description

python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \w+ match succeeds. For example, an attack might use elementname@ or elementname- with an onclick attribute.

Affected (1)

Products: Python Markdown2 Project: Python Markdown2

Python Markdown2 Project

1 product

Python Markdown2

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Python Markdown2 Project Python Markdown2	Up to 2.3.8

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (12)

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00031.html

Source: cve@mitre.org

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00035.html

Source: cve@mitre.org

https://github.com/trentm/python-markdown2/issues/348

Source: cve@mitre.org

ExploitThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XOAIRJJCZNJUALXDHSIGH5PS2H63A3J/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQLRBGRVRRZK7P5SFL2MNGXFX37YHJAV/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN6QSHRFZXRQAYZJQ4MOW5MKIXBYOMED/

Source: cve@mitre.org

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00031.html