What is GHSA-qx76-c53f-5c7q?

GHSA-qx76-c53f-5c7q is a security advisory published by GitHub Security Advisories with Medium severity. PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)

Which CVE IDs does GHSA-qx76-c53f-5c7q cover?

GHSA-qx76-c53f-5c7q covers the following CVE IDs: CVE-2018-20583. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-qx76-c53f-5c7q?

GHSA-qx76-c53f-5c7q has a CVSS v3 base score of 6.1, published by GitHub Security Advisories.

Which products are affected by GHSA-qx76-c53f-5c7q?

GHSA-qx76-c53f-5c7q affects 1 product, including: composer/league/commonmark:\u003e= 0.15.6, \u003c 0.18.1.

GHSA-qx76-c53f-5c7qMediumCVSS 6.1

PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)

Vendor

GitHub Security Advisories

Published

May 14, 2022

Last Modified

February 6, 2024

🔗 CVE IDs covered (1)

CVE-2018-20583 →

📋 Description

Cross-site scripting (XSS) vulnerability in the PHP League CommonMark library versions 0.15.6 through 0.18.x before 0.18.1 allows remote attackers to insert unsafe URLs into HTML (even if allow_unsafe_links is false) via a newline character (e.g., writing javascript as javascri%0apt).

🎯 Affected products1

composer/league/commonmark:>= 0.15.6, < 0.18.1

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2018-20583
https://github.com/thephpleague/commonmark/issues/337
https://commonmark.thephpleague.com/changelog/
https://github.com/thephpleague/commonmark/releases/tag/0.18.1
https://github.com/FriendsOfPHP/security-advisories/blob/master/league/commonmark/CVE-2018-20583.yaml
https://github.com/advisories/GHSA-qx76-c53f-5c7q