CVE-2021-24228 Patreon WordPress < 1.7.2 - Reflected XSS on Login Form

What is CVE-2021-24228?

CVE-2021-24228 is a critical cross-site scripting vulnerability in Unknown Patreon WordPress, published on 12 Apr 2021. 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

The Jetpack Scan team identified a Reflected Cross-Site Scripting in the Login Form of the Patreon WordPress plugin before 1.7.2. The WordPress login form (wp-login.php) is hooked by the plugin and offers to allow users to authenticate on the site using their Patreon account. Unfortunately, some of the error logging logic behind the scene allowed user-controlled input to be reflected on the login page, unsanitized.

Weakness: CWE-79

Which versions are affected by CVE-2021-24228?

It affects 1 product.

Products include Patreon Patreon Wordpress.

How do I fix CVE-2021-24228?

No fix has been published for CVE-2021-24228 yet. Limit exposure of the affected software until one is available.

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-2021-24228 being exploited?

There is no known exploitation of CVE-2021-24228 in the wild and no public exploit code.

Other vulnerabilities in Unknown Patreon WordPress

• CVE-2018-20984 Deserialization in n/a Critical 9.8
• CVE-2021-24229 Patreon WordPress < 1.7.2 - Reflected XSS on patreon_save_attachment_patreon_level AJAX action Critical 9.6
• CVE-2021-24230 Patreon WordPress < 1.7.0 - CSRF to Overwrite/Create User Meta High 8.1
• CVE-2021-24227 Patreon WordPress < 1.7.0 - Unauthenticated Local File Disclosure High 7.5
• CVE-2021-24231 Patreon WordPress < 1.7.0 - CSRF to Disconnect Sites From Patreon Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3g9j-v8wq-8c77.