Content Injection Vulnerability in Next.js Framework by Vercel
CVE-2025-55173

4.3MEDIUM

Key Information:

Vendor

Vercel
Status
Next.js
Vendor
CVE Published:
29 August 2025

What is CVE-2025-55173?

The Next.js framework, a popular choice for building full-stack applications, has a vulnerability that allows for content injection due to improper handling of external image sources. This flaw could enable attackers to trigger downloads of malicious files with manipulated content and filenames if specific configurations are exploited. This raises significant concerns, especially in terms of potential phishing attacks and distribution of harmful files. Users are encouraged to upgrade to patched releases in the middleware versions 14.2.31 and 15.4.5 to mitigate this risk.

Affected Version(s)

next.js >= 15.0.0, < 15.4.5 < 15.0.0, 15.4.5

next.js < 14.2.31 < 14.2.31

References

https://github.com/vercel/next.js/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/vercel/next.js/commit/6b12c60c61ee80cb...
x_refsource_MISC
https://vercel.com/changelog/cve-2025-55173
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-55173 : Content Injection Vulnerability in Next.js Framework by Vercel