WordPress through 4.7.4 relies on the Host HTTP header for a password-reset e-mail message, which makes it easier for remote attackers to reset arbitrary passwords by making a crafted wp-login.php?action=lostpassword request and then arranging for this message to bounce or be resent, leading to transmission of the reset key to a mailbox on an attacker-controlled SMTP server. This is related to problematic use of the SERVER_NAME variable in wp-includes/pluggable.php in conjunction with the PHP mail function. Exploitation is not achievable in all cases because it requires at least one of the following: (1) the attacker can prevent the victim from receiving any e-mail messages for an extended period of time (such as 5 days), (2) the victim's e-mail system sends an autoresponse containing the original message, or (3) the victim manually composes a reply containing the original message.

Several vulnerabilities were discovered in wordpress, a web blogging tool. The Common Vulnerabilities and Exposures project identifies the following issues.

CVE-2017-8295

Potential unauthorized password reset vulnerability. More information are available at :

https://exploitbox.io/vuln/WordPress-Exploit-4-7-Unauth-Password-Reset
-0day-CVE-2017-8295.html

CVE-2017-9061

A cross-site scripting (XSS) vulnerability exists when someone attempts to upload very large files.

CVE-2017-9062

Improper handling of post meta data values in the XML-RPC API.

CVE-2017-9063

Cross-site scripting (XSS) vulnerability in the customizer.

CVE-2017-9064

A Cross Site Request Forgery (CSRF) vulnerability exists in the filesystem credentials dialog.

CVE-2017-9065

Lack of capability checks for post meta data in the XML-RPC API.

For Debian 7 'Wheezy', these problems have been fixed in version 3.6.1+dfsg-1~deb7u15.

We recommend that you upgrade your wordpress packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities were discovered in wordpress, a web blogging tool. They would allow remote attackers to force password resets, and perform various cross-site scripting and cross-site request forgery attacks.

According to its self-reported version number, the WordPress application running on the remote web server is 4.7.x. It is, therefore, affected by a flaw in the wp_mail() function within file wp-includes/pluggable.php due to the improper usage of the SERVER_NAME variable, specifically when input from the HTTP Host header is assigned to SERVER_NAME. An unauthenticated, remote attacker can exploit this issue to reset arbitrary passwords by means of a crafted 'wp-login.php?action=lostpassword' request, which is then bounced or resent, resulting in the transmission of the reset key to a mailbox on an SMTP server under the attacker's control.

Note that exploitation of this vulnerability is not achievable in all cases because it requires at least one of the following conditions :

  - The attacker can prevent the victim from receiving any     e-mail messages for an extended period of time (such as     five days).

  - The victim's e-mail system sends an auto-response     containing the original message.

  - The victim manually composes a reply containing the     original message.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
100602	Debian DLA-975-1 : wordpress security update	Nessus	Debian Local Security Checks	high
100561	Debian DSA-3870-1 : wordpress - security update	Nessus	Debian Local Security Checks	high
100028	WordPress 2.3.0 - 4.8.3 Unauthorized Password Reset	Nessus	CGI abuses	medium

Detections

Analytics

CVE-2017-8295

medium

Tenable Plugins

high

high

medium