---
id: CVE-2025-14177
title: >-
  In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29,
  8.4.* before 8.4.16, 8.5.* before 8.5.1, the getimagesize() function may leak
  uninitialized heap memory into the APPn segments (e.g., APP1) when reading
  image…
summary: >-
  In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29,
  8.4.* before 8.4.16, 8.5.* before 8.5.1, the getimagesize() function may leak
  uninitialized heap memory into the APPn segments (e.g., APP1) when reading
  image…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
vendor: php
product: php
affected:
  - 'php >= 8.1.0, < 8.1.34'
  - 'php >= 8.2.0, < 8.2.30'
  - 'php >= 8.3.0, < 8.3.29'
  - 'php >= 8.4.0, < 8.4.16'
  - php = 8.5.0
patched:
  - php 8.4.16
published: '2025-12-27'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T09:10:00.323'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14177'
references:
  - url: 'https://github.com/php/php-src/security/advisories/GHSA-3237-qqm7-mfv7'
    label: security@php.net
tags:
  - nvd
  - exploit-available
epss: 0.00508
epssPercentile: 0.41675
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/gl1tch0x1/PHP_8.1.x_Exploit'
    - 'https://github.com/34zY/CVE-2025-14177'
  checkedAt: '2026-10-13T09:20:57.861Z'
exploitAvailable: true
ingestedAt: '2026-10-13T09:20:23.161Z'
---

## Overview

In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, the getimagesize() function may leak uninitialized heap memory into the APPn segments (e.g., APP1) when reading images in multi-chunk mode (such as via php://filter). This occurs due to a bug in php_read_stream_all_chunks() that overwrites the buffer without advancing the pointer, leaving tail bytes uninitialized. This may lead to information disclosure of sensitive heap data and affect the confidentiality of the target server.

## Affected

- `php >= 8.1.0, < 8.1.34`
- `php >= 8.2.0, < 8.2.30`
- `php >= 8.3.0, < 8.3.29`
- `php >= 8.4.0, < 8.4.16`
- `php = 8.5.0`

## Remediation

Upgrade past the affected range:

- `php 8.4.16`