CVE-2025-55173 Next.js Content Injection Vulnerability for Image Optimization
Attackers can inject malicious content via image optimization, enabling phishing or file delivery in specific Next.js configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-55173?
CVE-2025-55173 is a medium-severity vulnerability in Vercel Next.js, published on 29 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Next.js is a React framework for building full-stack web applications. In versions before 14.2.31 and from 15.0.0 to before 15.4.5, Next.js Image Optimization is vulnerable to content injection. The issue allowed attacker-controlled external image sources to trigger file downloads with arbitrary content and filenames under specific configurations. This behavior could be abused for phishing or malicious file delivery. This vulnerability has been fixed in Next.js versions 14.2.31 and 15.4.5.
Weakness: CWE-20
Which versions are affected by CVE-2025-55173?
4 open source packages ship an affected version, including next. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
next npm | From 0.9.9 | 14.2.31 |
next npm | From 0.9.9 | 14.2.31 |
next npm | From 15.0.0 | 15.4.5 |
next npm | From 15.0.0 | 15.4.5 |
Products include Vercel Next.js.
How do I fix CVE-2025-55173?
Upgrade next to a fixed version for your release line: 14.2.31 or 15.4.5.
Is CVE-2025-55173 being exploited?
There is no known exploitation of CVE-2025-55173 in the wild and no public exploit code.
Other vulnerabilities in Vercel Next.js
- CVE-2025-29927 Authorization Bypass in Next.js Middleware
- CVE-2026-44578 Next.js: Server-side request forgery in applications using WebSocket upgrades
- CVE-2026-94483 Next.js: Server-Side Request Forgery in Image Optimization
- CVE-2026-64642 Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
- CVE-2026-64645 Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname
Sources
Also known as GHSA-xv57-4mr9-wg8v, MINI-mwh6-gcfm-6cgg, ROOT-APP-NPM-CVE-2025-55173.