XSS within CKEditor component in Backdrop CMS



Published: 2020-03-26
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID N/A
CWE ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Backdrop CMS
Web applications / CMS

Vendor Backdrop CMS

Security Advisory

This security advisory describes one low risk vulnerability.

1) DOM-based cross-site scripting

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

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

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within WYSIWYG mode in CKEditor. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Backdrop CMS: 1.14.0, 1.14.0-preview, 1.14.1, 1.14.2, 1.14.3, 1.15.0, 1.15.0-preview

CPE External links

https://backdropcms.org/security/backdrop-sa-core-2020-001

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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