CVE-2020-11888: Python-MARKDOWN2 Project Python-MARKDOWN2

Medium severity, CVSS 6.1. EPSS: 1.9% chance of exploitation in the next 30 days.

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 products

• Python-MARKDOWN2 Project Python-MARKDOWN2: up to and including 2.3.8

Published 2020-04-20. Last modified 2026-06-17.