Vulnerability · Published Jul 6, 2022 · Assigned by GitHub_M
CVE-2022-31127Improper handling of email input in next-auth
High 7.1
In plain English
A high-severity cross-site scripting in next-auth from nextauthjs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
NextAuth.js is a complete open source authentication solution for Next.js applications. An attacker can pass a compromised input to the e-mail [signin endpoint](https://next-auth.js.org/getting-started/rest-api#post-apiauthsigninprovider) that contains some malicious HTML, tricking the e-mail server to send it to the user, so they can perform a phishing attack. Eg.: `balazs@email.com, <a href="http://attacker.com">Before signing in, claim your money!</a>`. This was previously sent to `balazs@email.com`, and the content of the email containing a link to the attacker's site was rendered in the HTML. This has been remedied in the following releases, by simply not rendering that e-mail in the HTML, since it should be obvious to the receiver what e-mail they used: next-auth v3 users before version 3.29.8 are impacted. (We recommend upgrading to v4, as v3 is considered unmaintained. next-auth v4 users before version 4.9.0 are impacted. If for some reason you cannot upgrade, the workaround requires you to sanitize the `email` parameter that is passed to `sendVerificationRequest` and rendered in the HTML. If you haven't created a custom `sendVerificationRequest`, you only need to upgrade. Otherwise, make sure to either exclude `email` from the HTML body or efficiently sanitize it.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | next-auth | 3.29.8 | GHSA-pgjx-7f9g-9463 |
| npm | next-auth | 4.9.0 | GHSA-pgjx-7f9g-9463 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextauthjs | next-auth | < 3.29.8>= 4.0.0, < 4.9.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
References
- https://next-auth.js.org/getting-started/upgrade-v4 x_refsource_MISC
- https://github.com/nextauthjs/next-auth/security/advisories/GHSA-pgjx-7f9g-9463 x_refsource_CONFIRM
- https://github.com/nextauthjs/next-auth/commit/ae834f1e08a4a9915665eecb9479c74c6b039c9c x_refsource_MISC
- https://github.com/nextauthjs/next-auth/releases/tag/next-auth%40v4.9.0 x_refsource_MISC
- https://next-auth.js.org/providers/email#customizing-emails x_refsource_MISC