SB2021091306 - Multiple vulnerabilities in WordPress 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021091306

SB2021091306 - Multiple vulnerabilities in WordPress

Published: September 13, 2021

Security Bulletin ID SB2021091306
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2021-39201)

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 editor. A remote authenticated 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) Security features bypass (CVE-ID: CVE-2021-39203)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an error in the block editor under certain conditions. A remote attacker can bypass access restrictions to view private post types/data.


3) Stored cross-site scripting (CVE-ID: CVE-2021-39202)

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 widget editor. A remote authenticated attacker can permanently 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.


Remediation

Install update from vendor's website.

References