GHSA-gx5p-jg67-6x7h
Next.js has cross-site scripting in beforeInteractive scripts with untrusted input
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
Applications that use `beforeInteractive` scripts together with untrusted content can be vulnerable to cross-site scripting. In affected versions, serialized script content was not escaped safely before being embedded into the document, which could allow attacker-controlled input to break out of the intended script context and execute arbitrary JavaScript in a visitor's browser.
### Fix
We now HTML-escape serialized `beforeInteractive` script content before embedding it into the page, preventing attacker-controlled content from breaking out of the inline script boundary.
### Workarounds
If you cannot upgrade immediately, do not pass untrusted data into `beforeInteractive` scripts. If that pattern is unavoidable, sanitize or escape the content before embedding it.
References
External links from the advisory. They lead to third-party sites.