CVE-2023-0874 Klaviyo <= 3.0.10 - Admin+ Stored XSS
High-privilege users can inject malicious scripts via unsanitized settings in the Klaviyo WordPress plugin, affecting multisite environments.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-0874?
CVE-2023-0874 is a medium-severity cross-site scripting vulnerability in Unknown Klaviyo, published on 10 Apr 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Klaviyo WordPress plugin before 3.0.10 does not sanitize and escape some of its 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-2023-0874?
It affects 1 product.
Products include Klaviyo Klavio.
How do I fix CVE-2023-0874?
No fix has been published for CVE-2023-0874 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-2023-0874 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0874 exists.
Sources
Also known as GHSA-6rcr-6w3p-5xj6.