CVE-2025-29927
CVSS v3
9.1
CRITICAL
EPSS Score
92.9 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.
Technical details
- Published
- 2025-03-21
- Exploit-DB
- EDB-52124
Frequently asked questions
What is CVE-2025-29927?
Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.
Is CVE-2025-29927 actively exploited?
Active exploitation of CVE-2025-29927 has not been confirmed. The EPSS score is 92.9%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-29927?
CVE-2025-29927 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Is CVE-2025-29927 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 30 free checks/month · Free API key
Other 2025 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).