ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-55173

Next.js is a React framework for building full-stack web applications.

Published Aug 29, 2025 · catalog updated Sep 2, 2025 · Cloudflare

Last checked Oct 25, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-55173. EPSS is 0.60%. Act only if a listed version of Cloudflare is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.60%
Remediation
Version ranges on file
Affected products
vendor vercel next.js 15.0.0, < 15.4.5

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor vercel next.js 15.0.0, < 15.4.515.0.0, < 15.4.5

How to fix CVE-2025-55173

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-55173. EPSS is 0.60%. Act only if a listed version of Cloudflare is installed.

Which versions are affected?

Compare what you have installed with vercel next.js 15.0.0, < 15.4.5 15.0.0, < 15.4.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 29, 2025 · EUVD

    Detected

    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 mali

  2. Sep 2, 2025 · EUVD

    Updated

    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 mali

Sources

  • Cloudflare WAF rulesVendor advisoryCVE-2025-55173

    CVE-2025-55173 is named in an emergency Cloudflare managed-rules release. The default action recorded for those rules is Block.

    developers.cloudflare.com
  • CVE.orgVulnerability recordCVE-2025-55173

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55173

    30-day exploitation probability 0.60%

    first.org
  • EUVDVulnerability recordEUVD-2025-26244

    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 download

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Cloudflare WAF rulesOct 25, 2026
  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 22, 2026
  • EUVDOct 22, 2026