!Next.js Middleware Bypass (CVE-2025-29927)
by Rat1337 - Sunday March 30, 2025 at 06:53 PM
#1
CVE-2025-29927 is a critical vulnerability in Next.js that allows attackers to bypass authorization checks by manipulating the x-middleware-subrequest
header. This affects versions prior to 14.2.25, 15.2.3, 13.5.9, and 12.3.5. Exploiting this flaw could grant unauthorized access to protected routes. To fix this, update Next.js to the latest patched versions. Additionally, implement secondary validation by adding authentication checks in your API routes, ensuring security isn't reliant solely on middleware.


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#2
thank you for sharing this, cant wait to have a look
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#3
yeahhhh very nice maboyyy
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#4
thank you for sharing this, cant wait to have a look

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#5
thank you for sharing this, cant wait to have a look
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#6
thanks for the bypass
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#7
thank you for sharing this dude
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#8
thanks sir for sharing this dude
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#9
(Mar 30, 2025, 06:53 PM)Rat1337 Wrote: CVE-2025-29927 is a critical vulnerability in Next.js that allows attackers to bypass authorization checks by manipulating the x-middleware-subrequest
header. This affects versions prior to 14.2.25, 15.2.3, 13.5.9, and 12.3.5. Exploiting this flaw could grant unauthorized access to protected routes. To fix this, update Next.js to the latest patched versions. Additionally, implement secondary validation by adding authentication checks in your API routes, ensuring security isn't reliant solely on middleware.

nice bro

(Mar 30, 2025, 06:53 PM)Rat1337 Wrote: CVE-2025-29927 is a critical vulnerability in Next.js that allows attackers to bypass authorization checks by manipulating the x-middleware-subrequest
header. This affects versions prior to 14.2.25, 15.2.3, 13.5.9, and 12.3.5. Exploiting this flaw could grant unauthorized access to protected routes. To fix this, update Next.js to the latest patched versions. Additionally, implement secondary validation by adding authentication checks in your API routes, ensuring security isn't reliant solely on middleware.

nice bro
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#10
lets see what we got here
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