CVE-2020-15249 Information

Description

October is a free open-source self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469 backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers this means that they could theoretically upload Javascript that would be executed on a path under the website’s domain (i.e. /storage/app/media/evil.svg) but they would have to convince their target to visit that location directly in the target’s browser as the backend does not display SVGs inline anywhere SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

CVSS Vector

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

Reference

https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4