CVE-2025-27108 Information

Description

dom-expressions is a Fine-Grained Runtime for Performant DOM Rendering. In affected versions the use of javascript’s .replace() opens up to potential Cross-site Scripting (XSS) vulnerabilities with the special replacement patterns beginning with $. Particularly when the attributes of Meta tag from solid-meta are user-defined attackers can utilise the special replacement patterns either $' or $\`` to achieve XSS. The solid-meta package has this issue since it uses useAffectand context providers which injects the used assets in the html header. \dom-expressions\ uses.replace()to insert the assets which is vulnerable to the special replacement patterns listed above. This effectively means that if the attributes of an asset tag contained user-controlled data it would be vulnerable to XSS. For instance there might be meta tags for the open graph protocol in a user profile page but if attackers set the user query to some payload abusing.replace()` then they could execute arbitrary javascript in the victim’s web browser. Moreover it could be stored and cause more problems. This issue has been addressed in version 0.39.5 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Reference

https://github.com/ryansolid/dom-expressions/commit/521f75dfa89ed24161646e7007d9d7d21da07767 https://github.com/ryansolid/dom-expressions/security/advisories/GHSA-hw62-58pr-7wc5