CVE-2021-3111 Cross-site scripting in n/a
Attackers can inject malicious scripts via the Express Entries Dashboard name field, potentially stealing user sessions or executing code.
- 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-2021-3111?
CVE-2021-3111 is a medium-severity cross-site scripting vulnerability in Concretecms Concrete Cms, published on 8 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Express Entries Dashboard in Concrete5 8.5.4 allows stored XSS via the name field of a new data object at an index.php/dashboard/express/entries/view/ URI.
Weakness: CWE-79
Which versions are affected by CVE-2021-3111?
It affects 1 product.
Products include Concretecms Concrete Cms.
How do I fix CVE-2021-3111?
No fix has been published for CVE-2021-3111 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-2021-3111 being exploited?
There is no known exploitation of CVE-2021-3111 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Concretecms Concrete Cms
- CVE-2023-48648 Concrete CMS allows unauthorized access because directories can be created with insecure permissions
- CVE-2022-21829 Code injection in concrete CMS
- CVE-2021-22958 Server-Side Request Forgery vulnerability in concrete5
- CVE-2021-40098 Path traversal in n/a
- CVE-2026-8134 Concrete CMS Vulnerable to Relative Path Traversal
Sources
Also known as GHSA-hwh7-pqc2-733j.