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Advisory
6 minutes read

eZ Publish Cross-Site Scripting Vulnerability

Purplemet Lab

April 27, 2020

Vulnerability

Purplemet Lab team discovered a cross-site scripting (XSS) vulnerability in eZ Publish 5.4. This version embeds an outdated third party component named VideoJS (version 3.2.0) which provides video-js.swf, a Flash file vulnerable to a cross-site scripting. The vulnerable component is bundled in eZ Publish extensions DemoBundle, ezdemo and ezdemo-ls-extension.

Solution

Update to DemoBundle v5.4.6.1, ezdemo v5.4.2.1, ezdemo-ls-extension v5.4.2.1 or latest version.

Proof of concept

The vulnerability can be triggered using the following URL: 

                            
                                http://ip//extension/ezdemo/design/ezdemo/flash/video-js.swf?readyFunction=alert('XSS')//

Reference

See EZSA-2020-003 security advisory.

Purplemet technology detection

Purplemet detects eZ Publish and VideoJS with version.

Purplemet detection of eZ Publish and VideoJS

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