---
title: "GHSA-8x2v-pcg7-94f4: Zend-JSON vulnerable to XXE/XEE attacks"
url: https://erroneo.us/security/ghsa/GHSA-8x2v-pcg7-94f4/
description: "GHSA-8x2v-pcg7-94f4 (critical, Composer (PHP)): Zend-JSON vulnerable to XXE/XEE attacks. Numerous components utilizing PHP's DOMDocument, SimpleXML, and…"
type: advisory
section: "Security Digest"
date_published: 2024-06-07
date_modified: 2024-06-07
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-8x2v-pcg7-94f4"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-8x2v-pcg7-94f4: Zend-JSON vulnerable to XXE/XEE attacks

## Affected packages

- Composer (PHP) `zendframework/zend-json` >= 2.1.0, < 2.1.6 → fixed: 2.1.6
- Composer (PHP) `zendframework/zend-json` >= 2.2.0, < 2.2.6 → fixed: 2.2.6

## Details

Numerous components utilizing PHP's DOMDocument, SimpleXML, and xmlparse functionality are vulnerable to two types of attacks: - XML eXternal Entity (XXE) Injection attacks. The above mentioned extensions are insecure by default, allowing external entities to be specified by adding a specific DOCTYPE element to XML documents and strings. By exploiting this vulnerability an application may be coerced to open arbitrary files and/or TCP connections. - XML Entity Expansion (XEE) vectors, leading to Denial of Service vectors. XEE attacks occur when the XML DOCTYPE declaration includes XML entity definitions that contain either recursive or circular references; this leads to CPU and memory consumption, making Denial of Service exploits trivial to implement.

## Sources

- [GitHub Advisory GHSA-8x2v-pcg7-94f4](https://github.com/advisories/GHSA-8x2v-pcg7-94f4)
- [github.com](https://github.com/zendframework/zend-json/commit/078e77a6e59cdbf32a94691afe3523db340f5da9)
- [github.com](https://github.com/zendframework/zend-json/commit/7a747fbefe566c28a94b7e7ca37c15fc09ba4754)
- [github.com](https://github.com/zendframework/zend-json/commit/865f96ecbc5e080fccb5e75304ce06ac57d2ce22)
- [github.com](https://github.com/zendframework/zend-json/commit/89fc6f760478dc15519cb3ef4e4976425dc6ee10)
- [github.com](https://github.com/zendframework/zend-json/commit/9fe5103dc9be472fa0a443ca36619a2953b6f88e)
- [github.com](https://github.com/zendframework/zend-json/commit/acc60fc3fe56f5b0ad218c4c5789b21f11bc3a89)
- [framework.zend.com](https://framework.zend.com/security/advisory/ZF2014-01)
- [github.com](https://github.com/FriendsOfPHP/security-advisories/blob/master/zendframework/zend-json/ZF2014-01.yaml)

---
Source page: https://erroneo.us/security/ghsa/GHSA-8x2v-pcg7-94f4/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt