CVE-2020-15276 Cross Site Scripting in baserCMS
Attackers can execute arbitrary JavaScript via crafted blog comment nicknames in baserCMS, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-15276?
CVE-2020-15276 is a high-severity cross-site scripting vulnerability in Basercms Basercms, published on 30 Oct 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
baserCMS before version 4.4.1 is vulnerable to Cross-Site Scripting. Arbitrary JavaScript may be executed by entering a crafted nickname in blog comments. The issue affects the blog comment component. It is fixed in version 4.4.1.
Weakness: CWE-79
Which versions are affected by CVE-2020-15276?
2 open source packages ship an affected version, including baserproject/basercms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
baserproject/basercms Packagist | From 4.4.0 | 4.4.1 |
baserproject/basercms Packagist | From 4.4.0 | 4.4.1 |
Products include Basercms Basercms.
How do I fix CVE-2020-15276?
Upgrade baserproject/basercms to 4.4.1 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-2020-15276 being exploited?
There is no known exploitation of CVE-2020-15276 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-fw5q-j9p4-3vxg.