SB2020100605 - Multiple vulnerabilities in MediaWiki

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Main Vulnerability Database SB2020100605

SB2020100605 - Multiple vulnerabilities in MediaWiki

Published: October 6, 2020

Security Bulletin ID SB2020100605
Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Information disclosure

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-2020-25812)

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 on "Special:Contributions". 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) Information disclosure (CVE-ID: CVE-2020-25869)

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

The vulnerability exists due to handling of actor ID does not necessarily use the correct database or correct wiki. A remote attacker can gain unauthorized access to sensitive information on the system.


3) Cross-site scripting (CVE-ID: CVE-2020-26120)

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 MobileFrontend extension. 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) Input validation error (CVE-ID: CVE-2020-26121)

The vulnerability allows a remote attacker to compromise the system.

The vulnerability exists due to a mishandled distinction between an upload restriction and a create restriction in the FileImporter extension. A remote attacker can force a wiki to have a page with a disallowed title.


Remediation

Install update from vendor's website.

References