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MEDIUM severity

CVE-2017-18357 — shopware

MEDIUM

CVE-2017-18357 is a medium-severity (CVSS 6.5) CWE-610 vulnerability in shopware/shopware. 3 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for shopware/shopware — see the affected versions and patch details below.

Shopware XXE Vulnerability

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
3 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
27.1%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
18.0%34.1%50.2%66.4%57.3%27.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘shopware/shopware

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Shopware before 5.3.4 has a PHP Object Instantiation issue via the sort parameter to the loadPreviewAction() method of the Shopware_Controllers_Backend_ProductStream controller, with resultant XXE via instantiation of a SimpleXMLElement object.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistshopware/shopwareall versions5.3.4composer require shopware/shopware:^5.3.4

Affected Products

1 product · 1 configurations
Application
shopwareshopware
< 5.3.4
range
Exploits & PoCs
3

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-46915remotephp✓ Verified

Shopware - createInstanceFromNamedArguments PHP Object Instantiation Remote Code Execution (Metasploit)

by Metasploit · May 23, 2019

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for shopware/shopware, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update shopware/shopware to 5.3.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-18357 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Shopware before 5.3.4 has a PHP Object Instantiation issue via the sort parameter to the loadPreviewAction() method of the Shopware_Controllers_Backend_ProductStream controller, with resultant XXE via instantiation of a SimpleXMLElement object.
O3 Security · Impact-Aware SCA

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CVE-2017-18357: shopware XXE — Fixed in 5.3.4