CVE-2019-9787 Cross-site scripting in n/a
Unauthenticated attackers can exploit XSS to gain admin access and execute arbitrary code via PHP file modification in WordPress.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-9787?
CVE-2019-9787 is a high-severity cross-site scripting vulnerability in Wordpress Wordpress, published on 14 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.
Weakness: CWE-352
Which versions are affected by CVE-2019-9787?
It affects 1 product.
Products include Wordpress Wordpress.
How do I fix CVE-2019-9787?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2019-9787 being exploited?
There is no known exploitation of CVE-2019-9787 in the wild and no public exploit code.
Public exploit code: 6 proofs of concept on GitHub.
Other vulnerabilities in Wordpress Wordpress
Sources
Also known as DEBIAN-CVE-2019-9787, GHSA-vqp9-3cmr-vgcc, UBUNTU-CVE-2019-9787.