CVE-2018-19146 : Concrete5 8.4.3 has XSS because config/concrete.php allows uploads (by administrators) of SVG files that may contain HTM

Concrete5 8.4.3 has XSS because config/concrete.php allows uploads (by administrators) of SVG files that may contain HTML data with a SCRIPT element.

Published 2019-06-17 20:15:10

Updated 2021-07-15 20:43:01

Source MITRE

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2018-19146

Concretecms » Concrete Cms » Version: 8.4.3
cpe:2.3:a:concretecms:concrete_cms:8.4.3:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.13%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 49 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
4.8	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N	1.7	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: nvd@nist.gov (Primary)

https://www.w3.org/TR/SVG2/intro.html#W3CCompatibility

Introduction — SVG 2
Third Party Advisory
https://hackerone.com/concrete5?view_policy=true

HackerOne
Third Party Advisory
https://www.concrete5.org/

concrete5 is a free CMS Open Source Content Management System
Vendor Advisory
https://hackerone.com/reports/437863

#437863 SVG file that HTML Included is able to upload via File Manager
Exploit;Issue Tracking;Third Party Advisory

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