CVE-2021-24153 Yoast SEO < 3.4.1 - Authenticated Stored Cross-Site Scripting (XSS)
Authenticated attackers can inject malicious scripts via bypassed blacklist filters in the Yoast SEO plugin, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-24153?
CVE-2021-24153 is a medium-severity cross-site scripting vulnerability in Unknown Yoast SEO, published on 5 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A Stored Cross-Site Scripting vulnerability was discovered in the Yoast SEO WordPress plugin before 3.4.1, which had built-in blacklist filters which were blacklisting Parenthesis as well as several functions such as alert but bypasses were found.
Weakness: CWE-79
Which versions are affected by CVE-2021-24153?
It affects 1 product.
Products include Yoast Yoast Seo.
How do I fix CVE-2021-24153?
No fix has been published for CVE-2021-24153 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-2021-24153 being exploited?
There is no known exploitation of CVE-2021-24153 in the wild and no public exploit code.
Other vulnerabilities in Unknown Yoast SEO
- CVE-2019-13478 Cross-site scripting in n/a
- CVE-2023-32300 WordPress Yoast SEO: Local Plugin <= 14.8 is vulnerable to Cross Site Scripting (XSS)
- CVE-2018-19370 Race condition in n/a
- CVE-2023-28785 WordPress Yoast SEO: Local Plugin <= 14.9 is vulnerable to Cross Site Scripting (XSS)
- CVE-2021-31779 Server-Side Request Forgery in yoast_seo
Sources
Also known as GHSA-qj4c-xvxc-5hqj.