SB2020070612 - Cross-site scripting in October CMS

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2020-4061)

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 copied into Froala richeditor. 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.

Remediation

Install update from vendor's website.

References

• https://github.com/octobercms/october/commit/b384954a29b89117e1c0d6035b3ede4f46df67c5
• https://github.com/octobercms/october/security/advisories/GHSA-3pc2-fm7p-q2vg
• https://research.securitum.com/the-curious-case-of-copy-paste/