CVE-2024-8660 Stored XSS in the "Top Navigator Bar" block
A stored XSS vulnerability in Concrete CMS allows a rogue administrator to inject malicious scripts into the Top Navigator Bar, affecting users who visit the home page.
- 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
- Available
What is CVE-2024-8660?
CVE-2024-8660 is a medium-severity cross-site scripting vulnerability in Concretecms Concrete Cms, published on 17 Sep 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Concrete CMS versions 9.0.0 through 9.3.3 are affected by a stored XSS vulnerability in the "Top Navigator Bar" block. Since the "Top Navigator Bar" output was not sufficiently sanitized, a rogue administrator could add a malicious payload that could be executed when targeted users visited the home page.The Concrete CMS Security Team gave this vulnerability a CVSS v4 score of 4.6 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N . This does not affect versions below 9.0.0 since they do not have the Top Navigator Bar Block. Thanks, Chu Quoc Khanh for reporting.
Weakness: CWE-79
Which versions are affected by CVE-2024-8660?
2 open source packages ship an affected version, including concrete5/concrete5. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
concrete5/concrete5 Packagist | From 9.0.0 | 9.3.3 |
concrete5/concrete5 Packagist | From 9.0.0 | 9.3.3 |
Products include Concretecms Concrete Cms.
How do I fix CVE-2024-8660?
Upgrade concrete5/concrete5 to 9.3.3 or later.
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-2024-8660 being exploited?
There is no known exploitation of CVE-2024-8660 in the wild and no public exploit code.
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-998c-q8hh-h8gv.