SB2019101304 - Multiple vulnerabilities in Gila CMS

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2019-17535)

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via the search parameter to blog-list.php. 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.

2) Arbitrary file upload (CVE-ID: CVE-2019-17536)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file extension within the moveAction() function in core/controllers/fm.php. A remote attacker can upload a malicious file via the admin/media_upload and fm/move and execute arbitrary file on the server.

Remediation

Install update from vendor's website.

References

• https://github.com/GilaCMS/gila/pull/48
• https://rastating.github.io/gila-cms-reflected-xss/
• https://github.com/GilaCMS/gila/pull/49
• https://rastating.github.io/gila-cms-upload-filter-bypass-and-rce/