SB2020122119 - Multiple vulnerabilities in MediaWiki

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Main Vulnerability Database SB2020122119

SB2020122119 - Multiple vulnerabilities in MediaWiki

Published: December 21, 2020

Security Bulletin ID SB2020122119
Severity
Low
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2020-35474)

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 Html::rawElement and Message::text. 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) Cross-site scripting (CVE-ID: CVE-2020-35475)

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 passed via userrights-expiry-current and userrights-expiry-none mesages. 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.


3) Cross-site scripting (CVE-ID: CVE-2020-35478)

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 BlockLogFormatter.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.


4) Cross-site scripting (CVE-ID: CVE-2020-35479)

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 BlockLogFormatter.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.


5) Information disclosure (CVE-ID: CVE-2020-35477)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to software fails to hide log entries under  certain conditions. A remote user can view the log entry and gain access to sensitive information.


6) Information disclosure (CVE-ID: CVE-2020-35480)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way application handles missing and hidden user accounts. A remote attacker can expose sensitive information about the hidden status to unprivileged viewers.


Remediation

Install update from vendor's website.

References