Improper Authorization Affecting next package, versions >=11.1.4 <12.3.5>=13.0.0 <13.5.9>=14.0.0 <14.2.25>=15.0.0-rc.0 <15.2.3>=15.3.0-canary.0 <15.3.0-canary.12
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published21 Mar 2025
- disclosed21 Mar 2025
- creditcold-try, Allam Rachid, Allam Yasser
Introduced: 21 Mar 2025
NewCVE-2025-29927 (opens in a new tab)How to fix?
Upgrade next to version 12.3.5, 13.5.9, 14.2.25, 15.2.3, 15.3.0-canary.12 or higher.
Overview
next is a react framework.
Affected versions of this package are vulnerable to Improper Authorization due to the improper handling of the x-middleware-subrequest header. An attacker can bypass authorization checks by sending crafted requests containing this specific header.
Workaround
This can be mitigated by preventing external user requests which contain the x-middleware-subrequest header from reaching your Next.js application.