CVE-2018-20583

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).
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 55%
VendorProductVersion
thephpleaguecommonmark
0.15.6 ≤
𝑥
≤ 0.18.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://commonmark.thephpleague.com/changelog/
https://github.com/thephpleague/commonmark/issues/337
https://github.com/thephpleague/commonmark/releases/tag/0.18.1
https://commonmark.thephpleague.com/changelog/
https://github.com/thephpleague/commonmark/issues/337
https://github.com/thephpleague/commonmark/releases/tag/0.18.1