CVE-2018-18943 XSS in baserCMS before 4.1.4
An attacker can inject malicious scripts via the category name field in the Upload menu, potentially compromising admin sessions.
- 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-2018-18943?
CVE-2018-18943 is a medium-severity cross-site scripting vulnerability in Basercms Basercms, published on 5 Nov 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
An issue was discovered in baserCMS before 4.1.4. In the Register New Category feature of the Upload menu, the category name can be used for XSS via the data[UploaderCategory][name] parameter to an admin/uploader/uploader_categories/edit URI.
Weakness: CWE-79
Which versions are affected by CVE-2018-18943?
2 open source packages ship an affected version, including baserproject/basercms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
baserproject/basercms Packagist | All versions | 4.1.4 |
baserproject/basercms Packagist | All versions | 4.1.4 |
Products include Basercms Basercms.
How do I fix CVE-2018-18943?
Upgrade baserproject/basercms to 4.1.4 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-2018-18943 being exploited?
There is no known exploitation of CVE-2018-18943 in the wild and no public exploit code.
Other vulnerabilities in Basercms Basercms
- CVE-2023-25654 baserCMS File Uploader Remote Code Execution (RCE) vulnerability
- CVE-2023-25655 baserCMS allows any file to be uploaded
- CVE-2017-10842 baserCMS SQL Injection vulnerability
- CVE-2026-30880 baserCMS: OS command injection vulnerability in installer
- CVE-2026-21861 baserCMS: OS Command Injection Leading to Remote Code Execution (RCE)
Sources
Also known as GHSA-fx2m-5m9v-jhgp.