CVE-2022-31127
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…
Does this matter?
Lower severity and a low EPSS score (1.13%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.13% probability · 66th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- nextauth.js/next-auth
- Source
- security-advisories@github.com
EPSS 1.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/nextauthjs/next-auth/commit/ae834f1e08a4a9915665eecb9479c74c6b039c9cPatch, Third Party Advisory
- https://github.com/nextauthjs/next-auth/releases/tag/next-auth%40v4.9.0Release Notes, Third Party Advisory
- https://github.com/nextauthjs/next-auth/security/advisories/GHSA-pgjx-7f9g-9463Exploit, Third Party Advisory
- https://next-auth.js.org/getting-started/upgrade-v4Vendor Advisory
- https://next-auth.js.org/providers/email#customizing-emailsVendor Advisory
- https://github.com/nextauthjs/next-auth/commit/ae834f1e08a4a9915665eecb9479c74c6b039c9cPatch, Third Party Advisory
- https://github.com/nextauthjs/next-auth/releases/tag/next-auth%40v4.9.0Release Notes, Third Party Advisory
- https://github.com/nextauthjs/next-auth/security/advisories/GHSA-pgjx-7f9g-9463Exploit, Third Party Advisory
- https://next-auth.js.org/getting-started/upgrade-v4Vendor Advisory
- https://next-auth.js.org/providers/email#customizing-emailsVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.