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GoogleOSV:GHSA-QX76-C53F-5C7QHistoryMay 14, 2022 - 1:40 a.m.
PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)
2022-05-1401:40:50
Google
osv.dev
8
php league commonmark
cross-site scripting
xss
vulnerability
remote attackers
unsafe urls
html
newline character
security
software
EPSS
0.001
Percentile
47.9%
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).
References
commonmark.thephpleague.com/changelog
github.com/FriendsOfPHP/security-advisories/blob/master/league/commonmark/CVE-2018-20583.yaml
github.com/thephpleague/commonmark
github.com/thephpleague/commonmark/issues/337
github.com/thephpleague/commonmark/releases/tag/0.18.1
nvd.nist.gov/vuln/detail/CVE-2018-20583
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