CVE-2019-10010: Thephpleague Commonmark

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the PHP League CommonMark library before 0.18.3 allows remote attackers to insert unsafe links into HTML by using double-encoded HTML entities that are not properly escaped during rendering, a different vulnerability than CVE-2018-20583.

Affected products

• Thephpleague Commonmark: before 0.18.3 (fixed in 0.18.3)

Published 2019-03-24. Last modified 2026-06-17.