Vulnerability · Published Aug 29, 2025 · Assigned by GitHub_M

CVE-2025-55173Next.js Content Injection Vulnerability for Image Optimization

Medium 4.3

In plain English

A medium-severity improper input validation in next.js from vercel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.6%top 51.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	next	14.2.31	GHSA-xv57-4mr9-wg8v
npm	next	15.4.5	GHSA-xv57-4mr9-wg8v

Affected products (as reported)

Vendor	Product	Versions
vercel	next.js	>= 15.0.0, < 15.4.5< 14.2.31

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References

https://github.com/vercel/next.js/security/advisories/GHSA-xv57-4mr9-wg8v x_refsource_CONFIRM
https://github.com/vercel/next.js/commit/6b12c60c61ee80cb0443ccd20de82ca9b4422ddd x_refsource_MISC
https://vercel.com/changelog/cve-2025-55173 x_refsource_MISC