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"product": "lxml_html_clean",
"vendor": "fedora-python",
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"version": "\u003c 0.4.0"
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"value": "lxml_html_clean is a project for HTML cleaning functionalities copied from `lxml.html.clean`. Prior to version 0.4.0, the HTML Parser in lxml does not properly handle context-switching for special HTML tags such as `\u003csvg\u003e`, `\u003cmath\u003e` and `\u003cnoscript\u003e`. This behavior deviates from how web browsers parse and interpret such tags. Specifically, content in CSS comments is ignored by lxml_html_clean but may be interpreted differently by web browsers, enabling malicious scripts to bypass the cleaning process. This vulnerability could lead to Cross-Site Scripting (XSS) attacks, compromising the security of users relying on lxml_html_clean in default configuration for sanitizing untrusted HTML content. Users employing the HTML cleaner in a security-sensitive context should upgrade to lxml 0.4.0, which addresses this issue. As a temporary mitigation, users can configure lxml_html_clean with the following settings to prevent the exploitation of this vulnerability. Via `remove_tags`, one may specify tags to remove - their content is moved to their parents\u0027 tags. Via `kill_tags`, one may specify tags to be removed completely. Via `allow_tags`, one may restrict the set of permissible tags, excluding context-switching tags like `\u003csvg\u003e`, `\u003cmath\u003e` and `\u003cnoscript\u003e`."
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"description": "CWE-83: Improper Neutralization of Script in Attributes in a Web Page",
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"description": "CWE-184: Incomplete List of Disallowed Inputs",
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"name": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-5jfw-gq64-q45f",
"tags": [
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"url": "https://github.com/fedora-python/lxml_html_clean/security/advisories/GHSA-5jfw-gq64-q45f"
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{
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{
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"discovery": "UNKNOWN"
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"title": "HTML Cleaner allows crafted scripts in special contexts like svg or math to pass through"
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"dateReserved": "2024-11-14T15:05:46.768Z",
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