What’s Vulnerable › Vulnerabilities

CVE-2019-10010

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-24 · updated 2026-06-17
• Weakness: CWE-79

Description

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

How to fix

Upgrade to a fixed version: thephpleague commonmark 0.18.3. Check the vendor advisory for mitigations.

References

• https://github.com/thephpleague/commonmark/issues/353
• https://github.com/thephpleague/commonmark/releases/tag/0.18.3
• https://github.com/thephpleague/commonmark/issues/353
• https://github.com/thephpleague/commonmark/releases/tag/0.18.3

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