SB2018100936 - Multiple vulnerabilities in in WP Fastest Cache for WordPress

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2018-17583)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the rules[0][content] parameter in a wpfc_save_exclude_pages action. 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 request forgery (CVE-ID: CVE-2018-17584)

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. 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, such as change plugin configuration.

3) Cross-site scripting (CVE-ID: CVE-2018-17585)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the wpfastestcacheoptions wpFastestCachePreload_number or wpFastestCacheLanguage parameter. 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-2018-17586)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the rules[0][content] parameter in a wpfc_save_timeout_pages action. 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.

Remediation

Install update from vendor's website.

References

• https://ansawaf.blogspot.com/2019/04/csrf-multiple-stored-xss-in-wp-fastest.html
• https://docs.google.com/document/d/17JSC97ecikWalB_ZTScNipFoud2aFXb5mXEZ7g-KIQI/edit?usp=sharing