GHSA-9x4v-xfq5-m8x5
Better Auth URL parameter HTML Injection (Reflected Cross-Site scripting)
Quick fix
GHSA-9x4v-xfq5-m8x5 — better-auth: upgrade to the fixed version with the command below.
npm install better-auth@1.1.16Details
### Summary The better-auth `/api/auth/error` page was vulnerable to HTML injection, resulting in a reflected cross-site scripting (XSS) vulnerability.
### Details The value of `error` URL parameter was reflected as HTML on the error page: https://github.com/better-auth/better-auth/blob/05ada0b79dbcac93cc04ceb79b23ca598d07830c/packages/better-auth/src/api/routes/error.ts#L81
### Impact An attacker who exploited this vulnerability by coercing a user to visit a specially-crafted URL could execute arbitrary JavaScript in the context of the user's browser.
Are you affected?
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Affected packages
References
- https://github.com/better-auth/better-auth/security/advisories/GHSA-9x4v-xfq5-m8x5 [WEB]
- https://github.com/better-auth/better-auth/commit/7ae340e2eddad641b7e43d24d37c58a66ce9ddcf [WEB]
- https://github.com/better-auth/better-auth [PACKAGE]
- https://github.com/better-auth/better-auth/blob/05ada0b79dbcac93cc04ceb79b23ca598d07830c/packages/better-auth/src/api/routes/error.ts#L81 [WEB]