CVE-2017-1000491

Shiba markdown live preview app version 1.1.0 is vulnerable to XSS which leads to code execution due to enabled node integration...

CVE-2019-15739

An issue was discovered in GitLab Community and Enterprise Edition 8.1 through 12.2.1. Certain areas displaying Markdown were not properly sanitizing some XSS payloads...

CVE-2017-1000459

Leanote version = 2.5 is vulnerable to XSS due to not sanitized input in markdown notes...

CVE-2019-19619

domain/section/markdown/markdown.go in Documize before 3.5.1 mishandles untrusted Markdown content. This was addressed by adding the bluemonday HTML sanitizer to defend against XSS...

CVE-2019-16215

The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server to spend an effectively arbitrary amount of CPU time and stall the processing of future messages...

CVE-2015-10005

A vulnerability was found in markdown-it up to 2.x. It has been classified as problematic. Affected is an unknown function of the file lib/common/htmlre.js. The manipulation leads to inefficient regular expression complexity. Upgrading to version 3.0.0 is able to address this issue. The name of t...

CVE-2009-3437

Cross-site scripting XSS vulnerability in the live preview feature in the Markdown Preview module 6.x for Drupal allows remote attackers to inject arbitrary web script or HTML via "Markdown input."...

PT-2026-23450

Name of the Vulnerable Software and Affected Versions Python-Markdown versions prior to 3.8.1 Description A flaw exists in Python-Markdown version 3.8 where improperly formed HTML-like sequences can trigger an unhandled AssertionError within the html.parser.HTMLParser during Markdown processing...

CVE-2025-46734

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

Cross-site Scripting (XSS)

Overview league/commonmark is a PHP-based Markdown parser which supports the full CommonMark spec. It is based on the CommonMark JS reference implementation. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the AttributesExtension. If the Attributes extension is in...

UBUNTU-CVE-2025-46734

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

CVE-2025-46734 league/commonmark Cross-site Scripting vulnerability in Attributes extension

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

CVE-2025-46734

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

CVE-2025-46734 league/commonmark Cross-site Scripting vulnerability in Attributes extension

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

CVE-2025-46734

CVE-2025-46734 affects the PHP Markdown parser league/commonmark, specifically the Attributes extension (versions 1.5.0–2.6.x). The vulnerability allows injection of dangerous HTML attributes via Markdown syntax (e.g., curly braces) that can bypass HTML sanitization settings. Version 2.7.0 mitiga...

CVE-2025-46734 league/commonmark Cross-site Scripting vulnerability in Attributes extension

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

commonmark Cross-Site Scripting Vulnerability

commonmark is a highly extensible PHP Markdown parser open-sourced by The League of Extraordinary Packages, with full support for the CommonMark and GFM specifications. A cross-site scripting vulnerability exists in commonmark versions 1.5.0 through 2.6.x. The vulnerability stems from the...

CVE-2025-46734: Improper Neutralization of Input During Web Page Generation

league/commonmark is a PHP Markdown parser. A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library versions 1.5.0 through 2.6.x allows remote attackers to insert malicious JavaScript calls into HTML. The league/commonmark library provides configurati...

CVE-2025-46558

XWiki Contrib's Syntax Markdown allows importing Markdown content into wiki pages and creating wiki content in Markdown. In versions starting from 8.2 to before 8.9, the Markdown syntax is vulnerable to cross-site scripting XSS through HTML. In particular, using Markdown syntax, it's possible for...

CVE-2025-46558

XWiki Contrib's Syntax Markdown allows importing Markdown content into wiki pages and creating wiki content in Markdown. In versions starting from 8.2 to before 8.9, the Markdown syntax is vulnerable to cross-site scripting XSS through HTML. In particular, using Markdown syntax, it's possible for...