Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTY3M3gtZjV3eC1meHB3

Cross Site Scripting and RCE in baserCMS

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.

Permalink: https://github.com/advisories/GHSA-673x-f5wx-fxpw
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTY3M3gtZjV3eC1meHB3
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: over 3 years ago
Updated: over 1 year ago

CVSS Score: 7.7
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Identifiers: GHSA-673x-f5wx-fxpw, CVE-2020-15159
References:

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

Repository: https://github.com/baserproject/basercms
Blast Radius: 4.6

Affected Packages