CVE-2020-15159
Cross Site Scripting and RCE in baserCMS
7.6
HIGH
CVSS 3.1
EPSS 1.6%
Description
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/)
How to fix CVE-2020-15159
To remediate CVE-2020-15159, upgrade the affected package to a fixed version below.
- —upgrade to 4.3.7 or later
Is CVE-2020-15159 being exploited?
Low — EPSS is 1.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 4.0.0, < 4.3.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |