Priority HIGH 77
league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Flavored Markdown Table extension's TableStartParser::tryStart() block-start scan.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00368 · Published 2026-10-08 · Fixed in 2.10.2 CWE-400
Priority MEDIUM 60
league/commonmark is a PHP library for parsing and rendering CommonMark Markdown.
CVSS 3.1MEDIUM 6.1· Network · No auth · User interaction · EPSS 0.00355 · Published 2026-08-06 · Fixed in 2.9.0 CWE-692
Priority MEDIUM 57
League CommonMark from 1.3.0 before 2.10.2 contains a cross-site scripting vulnerability that allows users posting Markdown to bypass the DisallowedRawHtml extension by ending raw HTML with a bare disallowed tag name.
CVSS 4.0MEDIUM 5.3· Network · No auth · User interaction · EPSS 0.0025 · Published 2026-10-08 · No fix listed CWE-80
Priority MEDIUM 50
Flysystem is an open source file storage library for PHP.
CVSS 3.1LOW 3.5· Network · Low privileges · User interaction · EPSS 0.00337 · Published 2026-09-29 · Fixed in 3.35.3 CWE-150
Priority MEDIUM 48
Flysystem is an open source file storage library for PHP.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.03486 · Published 2021-06-24 · Fixed in 1.1.4, 2.1.1 CWE-367
Priority MEDIUM 44
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00488 · Published 2026-09-07 · Fixed in 2.8.4 CWE-407
Priority MEDIUM 44
league/commonmark versions >= 2.0.0 and < 2.8.4 (patched in 2.9.0) contain a denial of service vulnerability in UniqueSlugNormalizer::normalize(), which restarts its numeric-suffix search from 1 on every slug collision,…
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00509 · Published 2026-09-07 · Fixed in 2.8.4 CWE-407
Priority MEDIUM 44
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Attributes extension where AttributesListener::findTargetAndDirection() performs quadratic-time sibling list scanning.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00509 · Published 2026-09-07 · Fixed in 2.8.4 CWE-407
Priority MEDIUM 44
league/commonmark versions before 2.9.1 contain multiple denial of service vulnerabilities in fenced code block detection, reference link label lookup, and emphasis delimiter processing that perform super-linear work on…
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00493 · Published 2026-09-07 · Fixed in 2.9.1 CWE-407
Priority MEDIUM 44
The league/commonmark (thephpleague/commonmark) library in versions >= 1.5.0 and < 2.9.1 contains quadratic parsing complexity in its SmartPunctExtension and AttributesExtension.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00515 · Published 2026-09-07 · Fixed in 2.9.1 CWE-407
Priority MEDIUM 44
commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the AttributesExtension when processing distinctly-named attributes.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00493 · Published 2026-09-07 · Fixed in 2.10.0 CWE-407
Priority MEDIUM 44
league/commonmark versions before 2.6.0 contain polynomial time complexity vulnerabilities in Markdown parsing that allow attackers to cause denial of service.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00488 · Published 2026-09-09 · Fixed in 2.6.0 CWE-407
Priority MEDIUM 43
league/oauth2-server is an implementation of an OAuth 2.0 authorization server written in PHP.
CVSS 3.1HIGH 8.2· Network · No auth · No interaction · EPSS 0.00951 · Published 2023-07-06 · Fixed in 8.5.3, 8.4.2 CWE-209
Priority MEDIUM 40
league/commonmark is a PHP library for parsing and rendering CommonMark Markdown.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.0063 · Published 2026-08-06 · Fixed in 2.9.0 CWE-1050
Priority LOW 37
commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in XmlRenderer that emits depth-proportional indentation for every XML tag.
CVSS 4.0MEDIUM 6.9· Network · No auth · No interaction · EPSS 0.00418 · Published 2026-09-07 · Fixed in 2.8.4 CWE-405
Priority LOW 37
league/commonmark (thephpleague/commonmark) versions >= 2.7.0 and < 2.9.1 contain a cross-site scripting vulnerability in the AttributesExtension.
CVSS 4.0MEDIUM 6.9· Network · No auth · No interaction · EPSS 0.00388 · Published 2026-09-07 · Fixed in 2.9.1 CWE-79
Priority LOW 34
league/commonmark is a PHP Markdown parser.
CVSS 4.0MEDIUM 6.3· Network · No auth · No interaction · EPSS 0.0025 · Published 2026-03-24 · Fixed in 2.8.2 CWE-185
Priority LOW 31
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…
CVSS 3.0MEDIUM 6.1· Network · No auth · User interaction · EPSS 0.01863 · Published 2018-12-30 · Fixed in 0.18.1 CWE-79
Priority LOW 29
league/commonmark is a PHP Markdown parser.
CVSS 3.1MEDIUM 6.4· Network · Low privileges · No interaction · EPSS 0.00384 · Published 2025-05-05 · Fixed in 2.7.0 CWE-79
Priority LOW 29
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 dur…
CVSS 3.0MEDIUM 6.1· Network · No auth · User interaction · EPSS 0.0105 · Published 2019-03-24 · Fixed in 0.18.3 CWE-79
Priority LOW 23
league/commonmark is a PHP Markdown parser.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00245 · Published 2026-03-07 · Fixed in 2.8.1 CWE-79