GHSA-673x-f5wx-fxpw

Cross Site Scripting and RCE in baserCMS

Source: GitHub Advisory Database (reviewed) Low CVE-2020-15159

Packages

Ecosystem	Package	Affected	Fixed in
Packagist	baserproject/basercms	>= 4.0.0, < 4.3.7	4.3.7

Details

As written in the advisory (Markdown source, shown as plain text).

baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). * Impact: XSS to RCE via Arbitrary file upload. * Attack vector is: Administrator must be logged in. * Components are: ThemeFilesController.php, UploaderFilesController.php. * Tested baserCMS Version : 4.3.6 (Latest) * Affected baserCMS Version : 4.2.0 ~ 4.3.6 (XSS), 3.0.10 ~ 4.3.6 (RCE) * Patches : https://basercms.net/security/20200827 Found by Vulnerability Research team in [Flatt Security Inc.](https://flatt.tech/)

References

External links from the advisory. They lead to third-party sites.

https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpw web
https://nvd.nist.gov/vuln/detail/CVE-2020-15159 advisory
https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d web
https://basercms.net/security/20200827 web