SB2017011503 - Arch Linux update for wordpress
Published: January 15, 2017 Updated: July 7, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Remote code injection (CVE-ID: CVE-2016-10033)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient sanitization of user-supplied input passed via specially crafted “From” address to mailSend() function. A remote attacker can use backslashed double quote character (e.g. \") to pass additional commands to original mail command and execute them with privileges of the current web server user.
Successful exploitation of the vulnerability may result in system compromise.
2) Remote code injection (CVE-ID: CVE-2016-10045)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists in PHPMailer due to insufficient sanitization of user-supplied input, when Sender property is not set. A remote attacker can use backslashed double quote character (e.g. \”) to pass additional commands to original mail command and execute them with privileges of the current web server user.
Successful exploitation of the vulnerability may result in system compromise.
Note: this vulnerability exists due to incorrect fix for vulnerability SB2016122601 (CVE-2016-10033)
3) Information disclosure (CVE-ID: CVE-2017-5487)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to incorrectly implemented restrictions within REST API ("wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php") when accessing listings of post authors via HTTP request to "wp-json/wp/v2/users" URL. A remote attacker can send a specially crafted HTTP request to vulnerable URL and obtain potentially sensitive data.
Successful exploitation of the vulnerability may allow an attacker to gain access to otherwise restricted sensitive information.
4) Cross-site scripting (XSS) (CVE-ID: CVE-2017-5488)
Vulnerability allows a remote attacker to perform Cross-site scripting attacks.
An input validation error exists in "wp-admin/update-core.php" script in WordPress before 4.7.1 when processing the "name" and "version" headers of a plugin. A remote attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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) Cross-site request forgery (CVE-ID: CVE-2017-5489)
The vulnerability allows a remote attacker to perform CSRF attacks.
The vulnerability exists due to improper validation of the HTTP request origin. A remote attacker can create a specially specially crafted web page, trick the authenticated victim into visiting it, perform cross-site request forgery attack and hijack authentication of unspecified victims.
Successful exploitation of the vulnerability may allow an attacker to hijack authentication.
6) Cross-site scripting (CVE-ID: CVE-2017-5490)
Vulnerability allows a remote authenticated attacker to perform XSS attacks.
The vulnerability is caused by an input validation error in the theme-name fallback functionality in "wp-includes/class-wp-theme.php" script in WordPress before 4.7.1. A remote authenticated attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.
7) Spoofing attack (CVE-ID: CVE-2017-5491)
The vulnerability allows a remote attacker to bypass certain security restriction.
The vulnerability exists due to an error within wp-mail.php script. A remote attacker can bypass imposed posting restrictions using a spoofed mail server with name mail.example.com.
Successful exploitation of the vulnerability may allow an attacker to perform unauthorized postings.
8) Cross-site request forgery (CSRF) (CVE-ID: CVE-2017-5492)
The vulnerability allows a remote attacker to perform CSRF attacks.
The vulnerability exists due to improper validation of the HTTP request origin within "wp-admin/includes/class-wp-screen.php" and "wp-admin/widgets.php" scripts. A remote attacker can create a specially specially crafted web page, trick the authenticated victim into visiting it, perform cross-site request forgery attack and hijack the authentication of unspecified victims for requests that perform a widgets-access action.
Successful exploitation of the vulnerability may allow an attacker to bypass authentication.
9) Insufficient randomization (CVE-ID: CVE-2017-5493)
The vulnerability allows a remote attacker to bypass certain security restriction.
The vulnerability exists due to an error when choosing random numbers for keys within wp-includes/ms-functions.php script in the Multisite WordPress API. A remote attacker can create a specially crafted site signup or user signup request and bypass intended access restriction.
Successful exploitation of the vulnerability may allow an attacker to gain access to otherwise restricted functionality.
Remediation
Install update from vendor's website.