SB2020050409 - Multiple vulnerabilities in Avada WordPress theme
Published: May 4, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Stored cross-site scripting (CVE-ID: N/A)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
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 in the "update_layout" function in the "fusion-builder/inc/class-fusion-builder-library.php" script. A remote authenticated attacker can inject 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) Permissions, Privileges, and Access Controls (CVE-ID: N/A)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to improper permissions checks in the "delete_layout" function. A remote authenticated attacker can delete any post or page on the website.
3) Permissions, Privileges, and Access Controls (CVE-ID: N/A)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to improper permissions checks in the "fusion_builder_save_layout" AJAX action used to call the "save_layout" function. A remote authenticated attacker can create a post, select several parameters (post type, post status, slug etc), as well as inject JavaScript code with the [fusion_code] attribute.
Remediation
Install update from vendor's website.