SB2025083004 - External image manipulation in Next.js
Published: August 30, 2025
Security Bulletin ID
SB2025083004
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2025-55173)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input within the Image Optimization feature. A remote attacker with control over external image sources can trigger file downloads with arbitrary content and filenames under specific configurations and perform phishing attacks.
Remediation
Install update from vendor's website.