Vulnerability advisory

GHSA-m496-x567-f98c

Fixes a bug in Zend Framework's Stream HTTP Wrapper

Published Apr 22, 2021Updated Jul 8, 2026OSV record ↗

Also known as CVE-2021-21426

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

openmage/magento-lts Packagist

All openmage/magento-lts advisories →

Affected	Fixed in
All versions before 19.4.13	`19.4.13`Advisories →
Also listed as affected (21) `1.9.1.1` `1.9.2.0` `1.9.2.1` `1.9.2.2` `1.9.2.3` `1.9.2.4` `1.9.3.0` `1.9.3.1` `v19.4.0` `v19.4.1` `v19.4.10` `v19.4.11` `v19.4.12` `v19.4.2` `v19.4.3` `v19.4.4` `v19.4.5` `v19.4.6` `v19.4.7` `v19.4.8` `v19.4.9`
`20.0.0` to before 20.0.9	`20.0.9`Advisories →
Also listed as affected (9) `v20.0.0` `v20.0.1` `v20.0.2` `v20.0.3` `v20.0.4` `v20.0.5` `v20.0.6` `v20.0.7` `v20.0.8`

Description

Impact

CVE-2021-3007: Backport of Zend_Http_Response_Stream, added certain type checking as a way to prevent exploitation. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3007

This vulnerability is caused by the unsecured deserialization of an object. In versions higher than Zend Framework 3.0.0, the attacker abuses the Zend3 feature that loads classes from objects in order to upload and execute malicious code in the server. The code can be uploaded using the “callback” parameter, which in this case inserts a malicious code instead of the “callbackOptions” array.

Patches

Has the problem been patched? What versions should users upgrade to? v20.0.9 v19.4.13