CVE-2023-44383 – october/system

Package

Manager: composer
Name: october/system
Vulnerable Version: >=3.0.0 <3.5.2

Severity

Level: Medium

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

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

EPSS: 0.0093 pctl0.7522

Details

October CMS stored XSS by authenticated backend user with improper configuration ### Impact A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. SVG files are supported by default in v3 for convenience; however, this has resulted in multiple mistaken vulnerability reports from security researchers. As per the documentation, if a backend user is not trusted, the advice is to remove the `svg` extension from the list of supported file types. ### Patches The issue has been patched in v3.5.2 by including an SVG sanister. It is enabled by default for new installations but must be enabled for existing sites in the **config/media.php** file. ``` 'clean_vectors' => true, ``` ### Workarounds If you cannot upgrade for this patch, follow the pervious advice and remove `svg` from the supported file types. ### References - https://github.com/octobercms/october/blob/3.x/config/media.php Credits to: - Faris Krivic - Okan Kurtulus - Aldin Visnjic - Bug Shankar ### For more information If you have any questions or comments about this advisory: * Email us at [hello@octobercms.com](mailto:hello@octobercms.com)

Metadata

Created: 2023-11-29T21:45:31Z
Modified: 2023-11-29T21:45:31Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-rvx8-p3xp-fj3p/GHSA-rvx8-p3xp-fj3p.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-rvx8-p3xp-fj3p
Finding: F425
Auto approve: 1