Spoofing attack in AWS SDK for PHP - CVE-2025-14761
Published: December 18, 2025
Vulnerability identifier: #VU120184
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-14761
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Amazon Web Services
Affected software:
AWS SDK for PHP
AWS SDK for PHP
Detailed vulnerability description
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to a single ciphertext can be decrypted into 2 different plaintexts by using different encryption keys. A remote user with permission to upload a new instruction file to the S3 bucket to replace the existing instruction file can create a rouge EDK key and force the application to use it in any future attempts to decrypt the underlying encrypted message with the S3EC.
How to mitigate CVE-2025-14761
Install updates from vendor's website.