SB2020060217 - Multiple vulnerabilities in Joomla!

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Main Vulnerability Database SB2020060217

SB2020060217 - Multiple vulnerabilities in Joomla!

Published: June 2, 2020 Updated: October 19, 2020

Security Bulletin ID SB2020060217
Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2020-13761)

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 heading tag option in the "Articles – Newsflash" and "Articles - Categories" modules. A remote authenticated user 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) Insecure default configuration (CVE-ID: CVE-2020-13763)

The vulnerability allows a remote attacker to perform XSS attack.

The vulnerability exists due to the default settings of the global "textfilter" configuration doesn't block HTML inputs for 'Guest' users. A remote user can inject and execute arbitrary HTML code in victim's browser in context of the website.


3) Cross-site scripting (CVE-ID: CVE-2020-13762)

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 module tag option in com_modules. 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.


4) Cross-site request forgery (CVE-ID: CVE-2020-13760)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in com_postinstall component. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.


Remediation

Install update from vendor's website.

References