Information Disclosure Vulnerability in PHP Affects Multichunk Image Processing
CVE-2025-14177

6.3MEDIUM

Key Information:

Vendor

PHP Group

Status
PHP
Vendor
CVE Published:
27 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-14177?

The getimagesize() function in PHP versions earlier than specified versions is affected by a vulnerability that results in the potential leak of uninitialized heap memory through the APPn segments when processing images in a multi-chunk mode. This can expose sensitive information from the server's memory, compromising data confidentiality. The flaw arises from a bug in the php_read_stream_all_chunks() function, which fails to properly manage the buffer pointer, leaving parts of it uninitialized. This issue underscores the importance of timely software updates and implementations of best security practices.

Affected Version(s)

PHP 8.1.*

PHP 8.1.* < 8.1.34

PHP 8.2.* < 8.2.30

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-14177
Created by 34zY

References

https://github.com/php/php-src/security/advisories/GHSA-3...

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nikita Sveshnikov (Positive Technologies)
.