Description
The HTMLSanitizer class in html-sanitizer.ts in all released versions of the Aurelia framework 1.x repository is vulnerable to XSS. The sanitizer only attempts to filter SCRIPT elements, which makes it feasible for remote attackers to conduct XSS attacks via (for example) JavaScript code in an attribute of various other elements. An attacker might also exploit a bug in how the SCRIPT string is processed by splitting and nesting them for example.
Remediation
References
https://aurelia.io
https://github.com/aurelia/templating-resources/blob/0cef07a8cac8e99146d8e1c4b734491bb3dc4724/src/html-sanitizer.js
https://www.gosecure.net/blog/2021/05/12/aurelia-framework-insecure-default-allows-xss/
Related Vulnerabilities
CVE-2023-48293 Vulnerability in maven package org.xwiki.contrib:xwiki-application-admintools
CVE-2021-24122 Vulnerability in maven package org.apache.tomcat.embed:tomcat-embed-core
CVE-2018-1000610 Vulnerability in maven package io.jenkins:configuration-as-code
CVE-2022-24818 Vulnerability in maven package org.geotools:gt-metadata
CVE-2010-2076 Vulnerability in maven package org.apache.cxf:cxf-bundle