CVE-2023-0491 Schedulicity - Easy Online Scheduling <= 2.21 - Contributor+ Stored XSS
Contributors can inject malicious scripts via shortcode attributes in the Schedulicity plugin, 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-2023-0491?
CVE-2023-0491 is a medium-severity cross-site scripting vulnerability in Unknown Schedulicity, published on 27 Mar 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 Schedulicity WordPress plugin through 2.21 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
Which versions are affected by CVE-2023-0491?
It affects 1 product.
Products include Schedulicity Schedulicity.
How do I fix CVE-2023-0491?
No fix has been published for CVE-2023-0491 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-2023-0491 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0491 exists.
Sources
Also known as GHSA-7px2-jqwm-jhmm.