CVE-2021-24516 PlanSo Forms <= 2.6.3 - Authenticated Stored Cross-Site Scripting
High-privilege users can inject malicious scripts into form titles, leading to stored XSS attacks against other users.
- 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-2021-24516?
CVE-2021-24516 is a medium-severity cross-site scripting vulnerability in Unknown PlanSo Forms, published on 18 Oct 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The PlanSo Forms WordPress plugin through 2.6.3 does not escape the title of its Form before outputting it in attributes, allowing high privilege users such as admin to set XSS payload in it, even when the unfiltered_html is disallowed, leading to an Authenticated Stored Cross-Site Scripting issue.
Weakness: CWE-79
Which versions are affected by CVE-2021-24516?
It affects 1 product.
Products include Planso Planso Forms.
How do I fix CVE-2021-24516?
No fix has been published for CVE-2021-24516 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-2021-24516 being exploited?
There is no known exploitation of CVE-2021-24516 in the wild and no public exploit code.
Sources
Also known as GHSA-p4vw-x9cg-642w.