![](https://i0.wp.com/autobahn-security.com/wp-content/uploads/2025/04/CVE-2-aspect-ratio-1370-780-1.png?fit=1902%2C1082&ssl=1) **📌 Technical Analysis** - **Vulnerable Flow:** ```js // pages/api/[...nextauth].js export default NextAuth({ callbacks: { async session() { /* Bypass occurs here */ } } }) ``` - **Exploit Scenario:** Malformed session objects bypass NextAuth validation **🛠️ Mitigation Steps:** 1. **Patching:** ```bash npm install next@14.3.3 next-auth@4.24.6 ``` 2. **Temporary Workaround:** ```js // Add manual session validation if (!session.user?.id) throw new Error("Unauthorized"); ``` 3. **Forensics:** ```bash cat next.log | grep -E "session.*null" ``` [**Download Free Here!**](https://tools.crack-vault.de/download-cve-2025-29927-authentication-bypass-in-next-js) **🔗 References:** [Next.js Security Advisory](https://nextjs.org/security) [OWASP Auth Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html) #ReactSecurity #JWT #WebDev

Support Crack-Vault and help us keep providing free tools. Every donation counts! (BTC) Address: bc1qhhva8uplmkaa3kkwxnux9t3y6l6kmhnwqzktzn

CVE-2025-29927 - Next.js Authentication Bypass Deep Dive

📌 Technical Analysis

Vulnerable Flow:

  // pages/api/[...nextauth].js
  export default NextAuth({
    callbacks: {
      async session() { /* Bypass occurs here */ }
    }
  })

🛠️ Mitigation Steps:

Patching:

   npm install next@14.3.3 next-auth@4.24.6

Temporary Workaround:

   // Add manual session validation
   if (!session.user?.id) throw new Error("Unauthorized");

Forensics:

   cat next.log | grep -E "session.*null"

🔗 References:
Next.js Security Advisory
OWASP Auth Cheat Sheet

#ReactSecurity #JWT #WebDev

📱