Vulnerability · Published Aug 28, 2020 · Assigned by GitHub_M

CVE-2020-15159Cross Site Scripting leading to RCE in baserCMS

High 7.6

In plain English

A high-severity cross-site scripting in basercms from baserproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 82% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)2.2%top 17.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). This may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file.The affected components are ThemeFilesController.php and UploaderFilesController.php. This is fixed in version 4.3.7.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	baserproject/basercms	4.3.7	GHSA-673x-f5wx-fxpw

Affected products (as reported)

Vendor	Product	Versions
baserproject	basercms	unspecified – before < 4.3.7

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

References

https://basercms.net/security/20200827 x_refsource_MISC
https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpw x_refsource_CONFIRM
https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d x_refsource_MISC