SB2019101505 - Multiple vulnerabilities in WordPress 

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Main Vulnerability Database SB2019101505

SB2019101505 - Multiple vulnerabilities in WordPress

Published: October 15, 2019 Updated: March 25, 2020

Security Bulletin ID SB2019101505
Severity
Medium
Patch available
YES
Number of vulnerabilities 7
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 57% Low 43%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 7 secuirty vulnerabilities.


1) Stored cross-site scripting (CVE-ID: CVE-2019-17674)

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 Customizer. A remote 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) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2019-17669)

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of URLs. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.


3) Stored cross-site scripting (CVE-ID: CVE-2019-17672)

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 Style Tags. A remote 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.


4) Improper access control (CVE-ID: CVE-2019-17671)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists in the "WP_Query" due to improper access restrictions to private and draft posts. A remote unauthenticated attacker can use a method to view posts.

Example: 

http://[host]/?static=1&order=asc

5) Spoofing attack (CVE-ID: CVE-2019-17673)

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input passed via the Vary: Origin header. A remote attacker can send a specially crafted HTTP GET request to poison the cache of JSON files.


6) Improper input validation (CVE-ID: CVE-2019-17675)

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input passed via the referred header in the admin panel. A remote attacker can trick a victim to visit a specially crafted webpage and bypass implemented security restrictions that rely on HTTP referrer header.


7) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2019-17670)

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of relative paths on Windows system. A remote attacker can send a specially crafted HTTP request to the website and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, but requires that WordPress in deployed on Windows system.


Remediation

Install update from vendor's website.

References