CVE-2025-67716: nextjs-auth0 · Incomplete List of Disallowed Inputs
Affects nextjs-auth0Source CVE Database V5
Not known to be exploited · CVSS 5.7 Medium : upgrade to 4.13.0 when convenient.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.13.0
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 11 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Upgrade nextjs-auth0 to 4.13.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
npmnextjs-auth0pkg:npm/nextjs-auth0Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
European organizations should immediately upgrade the Auth0 Next.js SDK to version 4.13.0 or later, where the vulnerability is patched. Additionally, developers should review and harden input validation logic for OAuth parameters, especially returnTo, to ensure only safe and intended URLs are accepted. Implement strict allowlists for redirect URIs and OAuth parameters to prevent injection of malicious inputs. Conduct thorough code audits and penetration testing focusing on authentication flows to detect similar issues. Employ runtime monitoring and anomaly detection to identify unusual OAuth parameter usage or token issuance patterns. Educate developers on secure OAuth implementation practices and maintain up-to-date dependencies to reduce exposure to known vulnerabilities.
Description
The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions 4.9.0 through 4.12.1 contain an input-validation flaw in the returnTo parameter, which could allow attackers to inject unintended OAuth query parameters into the Auth0 authorization request. Successful exploitation may result in tokens being issued with unintended parameters. This issue is fixed in version 4.13.0.