CVE-2021-46875 – ezsystems/ezpublish-kernel

Package

Manager: composer
Name: ezsystems/ezpublish-kernel
Vulnerable Version: >=6.13.0 <6.13.8.2 || >=7.5.0 <7.5.15.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00385 pctl0.58971

Details

Cross Site Scripting in eZ Platform Ibexa Kernel ## Impact In file upload it is possible by certain means to upload files like .html and .js. These may contain XSS exploits which will be run when links to them are accessed by victims. Patches ## Patches The fix consists simply of adding common types of scriptable file types to the configuration of the already existing filetype blacklist feature. See "Patched versions". As such, this can also be done manually, without installing the patched versions. This may be relevant if you are currently running a considerably older version of the kernel package and don't want to upgrade it at this time. Please see the settting "ezsettings.default.io.file_storage.file_type_blacklist" at: https://github.com/ezsystems/ezplatform-kernel/blob/master/eZ/Bundle/EzPublishCoreBundle/Resources/config/default_settings.yml#L109 Important note ## Important note You should adapt this setting to your needs. Do not add file types to the blacklist that you actually need to be able to upload. For instance, if you need your editors to be able to upload SVG files, then don't blacklist that. Instead, you could e.g. use an approval workflow for such content.

Metadata

Created: 2023-03-12T06:30:21Z
Modified: 2025-03-05T13:54:16Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-c737-jhwr-fqxj/GHSA-c737-jhwr-fqxj.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-c737-jhwr-fqxj
Finding: F425
Auto approve: 1