CVE-2021-24366 Admin Columns Free < 4.3 & Pro < 5.5.1 - Admin+ Stored XSS in Label
High-privilege users can inject malicious scripts via unsanitized label settings in Admin Columns plugins, enabling stored XSS attacks in multisite environments.
- 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-2021-24366?
CVE-2021-24366 is a medium-severity cross-site scripting vulnerability in Unknown Admin Columns, published on 21 Jun 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
The Admin Columns WordPress plugin before 4.3 and Admin Columns Pro WordPress plugin before 5.5.1 do not sanitise and escape its Label settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
Which versions are affected by CVE-2021-24366?
It affects 1 product.
Products include Admincolumns Admin Columns.
How do I fix CVE-2021-24366?
No fix has been published for CVE-2021-24366 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-2021-24366 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24366 exists.
Other vulnerabilities in Unknown Admin Columns
Sources
Also known as GHSA-hrfw-7pg5-g3x6.