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Vulnerability of eZ Publish Legacy: Cross Site Scripting via DB Handler Error Messages

Synthesis of the vulnerability 

An attacker can trigger a Cross Site Scripting via DB Handler Error Messages of eZ Publish Legacy, in order to run JavaScript code in the context of the web site.
Vulnerable systems: eZ Publish.
Severity of this threat: 2/4.
Creation date: 15/05/2019.
Références of this weakness: VIGILANCE-VUL-29312.

Description of the vulnerability 

An attacker can trigger a Cross Site Scripting via DB Handler Error Messages of eZ Publish Legacy, in order to run JavaScript code in the context of the web site.
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This computer vulnerability impacts software or systems such as eZ Publish.

Our Vigil@nce team determined that the severity of this weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this weakness.

Solutions for this threat 

eZ Publish Legacy: version 2018.09.5.
The version 2018.09.5 is fixed:
  https://github.com/ezsystems/ezpublish-legacy/releases/tag/v2018.09.5

eZ Publish Legacy: version 2017.12.7.
The version 2017.12.7 is fixed:
  https://github.com/ezsystems/ezpublish-legacy/releases/tag/v2017.12.7
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