Happy DOM: SSRF via iframe and link stylesheet when parsing untrusted HTML

[ Description ]Official description

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel="stylesheet" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0.

[ Fixes ]Fixes and patches

• happy-dom 21.0.0Fixed version · GitHub Advisories · npm package happy-dom: upgrade to 21.0.0 or later (affected <= 20.14.6)

[ Packages ]Affected open-source packages

• happy-dom npmAffected <= 20.14.6 · fixed in 21.0.0 · GHSA-c8p4-j97h-3vg8

[ References ]References

• github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74
• github.com/capricorn86/happy-dom/pull/2502
• github.com/capricorn86/happy-dom/releases/tag/v21.0.0
• github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8