In WordPress before 4.9.9 and 5.x before 5.0.1, authors could modify metadata to bypass intended restrictions on deleting files.

PHPMailer before 5.2.27 and 6.x before 6.0.6 is vulnerable to an object injection attack.

In WordPress 4.9.7, plugins uploaded via the admin area are not verified as being ZIP files. This allows for PHP files to be uploaded. Once a PHP file is uploaded, the plugin extraction fails, but the PHP file remains in a predictable wp-content/uploads location, allowing for an attacker to then execute the file. This represents a security risk in limited scenarios where an attacker (who does have the required capabilities for plugin uploads) cannot simply place arbitrary PHP code into a valid plugin ZIP file and upload that plugin, because a machine's wp-content/plugins directory permissions were set up to block all new plugins.

WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, which is passed to the PHP unlink function and can delete the wp-config.php file. This is related to missing filename validation in the wp-includes/post.php wp_delete_attachment function. The attacker must have capabilities for files and posts that are normally available only to the Author, Editor, and Administrator roles. The attack methodology is to delete wp-config.php and then launch a new installation process to increase the attacker's privileges.

Before WordPress 4.9.5, the version string was not escaped in the get_the_generator function, and could lead to XSS in a generator tag.

Before WordPress 4.9.5, the URL validator assumed URLs with the hostname localhost were on the same host as the WordPress server.

Before WordPress 4.9.5, the redirection URL for the login page was not validated or sanitized if forced to use HTTPS.

WordPress version 4.9.8 and earlier contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution due to an incomplete fix for CVE-2017-1000600. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time.

WordPress 4.7.2 mishandles listings of post authors, which allows remote attackers to obtain sensitive information (Path Disclosure) via a /wp-json/oembed/1.0/embed?url= request, related to the "author_name":" substring.

WordPress version <4.9 contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time. This issue appears to have been partially, but not completely fixed in WordPress 4.9

WordPress before 4.4 makes it easier for remote attackers to predict password-recovery tokens via a brute-force approach.

Blogger Importer Plugin blogger-importer.php restart cross-site request forgery

A vulnerability was found in Blogger Importer Plugin up to 0.5 on WordPress. It has been classified as problematic. Affected is the function start/restart of the file blogger-importer.php. The manipulation leads to cross-site request forgery. It is possible to launch the attack remotely. Upgrading to version 0.6 is able to address this issue. The patch is identified as b83fa4f862b0f19a54cfee76060ec9c2e7f7ca70. It is recommended to upgrade the affected component. VDB-230658 is the identifier assigned to this vulnerability.

dd32 Debug Bar Plugin class-debug-bar-queries.php render cross site scripting

A vulnerability was found in dd32 Debug Bar Plugin up to 0.8 on WordPress. It has been declared as problematic. Affected by this vulnerability is the function render of the file panels/class-debug-bar-queries.php. The manipulation leads to cross site scripting. The attack can be launched remotely. Upgrading to version 0.8.1 is able to address this issue. The patch is named 0842af8f8a556bc3e39b9ef758173b0a8a9ccbfc. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-222739.

A flaw exists in Wordpress related to the 'wp-admin/press-this.php 'script improperly checking user permissions when publishing posts. This may allow a user with 'Contributor-level' privileges to post as if they had 'publish_posts' permission.