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Fencer Intel
medium 6.5

CVE-2019-12799 json

Shopware Insecure Deserialization Vulnerability

published 7y ago modified 4mo ago also GHSA-rf8f-hqjv-986p , EUVD-2022-5158

cvss
6.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
54.1%
EPSS 54.1% chance of exploitation in 30 days, percentile 99%
public exploits
1
Metasploit

Summary

In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted web request can trigger a PHP object instantiation vulnerability, which can result in an arbitrary deserialization if the right class is instantiated. An attacker can leverage this deserialization to achieve remote code execution. NOTE: this issue is a bypass for a CVE-2017-18357 whitelist patch.

Patch / fix

Is CVE-2019-12799 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. First public exploit (Metasploit exploit/multi/http/shopware_createinstancefromnamedarguments_rce)
  2. Published

Exploit prediction

54.06% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.0 6.5 CVSS:3.0/AC:L/AV:N/A:N/C:H/I:N/PR:L/S:U/UI:N
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist shopware/shopware
>=5.3.0, <=5.6.0
 no fix listed

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.