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...

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...

PT-2025-19795 · Unknown +1 · League/Commonmark +1

Name of the Vulnerable Software and Affected Versions: league/commonmark versions 1.5.0 through 2.6.x Description: A cross-site scripting XSS vulnerability in the Attributes extension of the league/commonmark library allows remote attackers to insert malicious JavaScript calls into HTML. The...

Inefficient Algorithmic Complexity

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 Inefficient Algorithmic Complexity through the parsing of specially crafted Markdown...

PT-2024-40232 · League Of Extraordinary Packages · League/Commonmark

Name of the Vulnerable Software and Affected Versions: league/commonmark versions prior to 2.6.0 Description: The issue is related to polynomial time complexity problems in the league/commonmark library, which can lead to unbounded resource exhaustion and denial of service. Malicious users can...

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

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

GHSA-QX76-C53F-5C7Q PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

GHSA-3V43-877X-QGMQ Moderate severity vulnerability that affects league/commonmark

CVE-2019-10010 Impact In league/commonmark 0.18.2 and below, malicious users can insert double-encoded HTML entities into their Markdown like this: md XSS This library would correctly unescape the & entity to & during the parsing step. However, the renderer step would fail to properly re-escape t...

Moderate severity vulnerability that affects league/commonmark

CVE-2019-10010 Impact In league/commonmark 0.18.2 and below, malicious users can insert double-encoded HTML entities into their Markdown like this: md XSS This library would correctly unescape the & entity to & during the parsing step. However, the renderer step would fail to properly re-escape t...

Cross-Site Scripting (XSS)

league/commonmark is vulnerable to cross-site scripting XSS. A remote attacker is able to inject arbitrary Javascript into a victim's browser via unsafe links using double-encoded HTML entities to steal session tokens or perform unwanted actions on behalf of the user...

PHP League CommonMark library cross-site scripting vulnerability

PHP League CommonMark library is a PHP-based Markdown parser from the Extraordinary Packages consortium. A cross-site scripting vulnerability exists in PHP League CommonMark library versions prior to 0.18.3, which stems from the program failing to properly escape double-encoded HTML entities. A...

CVE-2019-10010

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 during rendering, a different vulnerability than CVE-2018-20583...

commonmark cross-site scripting vulnerability

PHP League CommonMark library is a PHP-based Markdown parser. A cross-site scripting vulnerability exists in PHP League CommonMark library versions 0.15.6 through 0.18.1 and earlier. A remote attacker can exploit this vulnerability by injecting insecure URLs into HTML using line breaks...

Cross site scripting

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

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 allowunsafelinks is false via a newline character e.g., writing javascript as javascri%0apt...

CVE-2018-20583

The PHP League CommonMark library (versions 0.15.6–0.18.x before 0.18.1) is affected by CVE-2018-20583: an XSS flaw that lets remote attackers insert unsafe URLs into HTML via newline-encoded strings (e.g., javascri%0apt), even when allow_unsafe_links is false. Remediation: upgrade to 0.18.1 or l...