XSS in python-markdown2 · CVE-2020-11888 · GitHub Advisory Database · GitHub

XSS in python-markdown2

Moderate severity GitHub Reviewed Published Apr 22, 2020 to the GitHub Advisory Database • Updated Sep 1, 2023

Package

markdown2 (pip)

Affected versions

<= 2.3.8

Patched versions

2.3.9

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.

References

Reviewed Apr 22, 2020

Published to the GitHub Advisory Database Apr 22, 2020

Last updated Sep 1, 2023

Severity

Moderate

6.1

/ 10

CVSS base metrics

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

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