CVE-2023-5560 WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS
Unauthenticated attackers can inject malicious scripts via the X-Forwarded-For header in WP-UserOnline, leading to stored XSS attacks.
- 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
- None listed
What is CVE-2023-5560?
CVE-2023-5560 is a medium-severity cross-site scripting vulnerability in Unknown WP-UserOnline, published on 27 Nov 2023. 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 WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks.
Weakness: CWE-79
Which versions are affected by CVE-2023-5560?
It affects 1 product.
Products include Lesterchan Wp-Useronline.
How do I fix CVE-2023-5560?
No fix has been published for CVE-2023-5560 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-2023-5560 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-5560 exists.
Sources
Also known as GHSA-3v9m-2r3c-48wc.