CVE-2026-32734 baserCMS: Multiple vulnerabilities in baserCMS
An attacker can execute arbitrary scripts in the victim's browser via DOM-based XSS in tag creation within baserCMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-32734?
CVE-2026-32734 is a high-severity cross-site scripting vulnerability in Basercms Basercms, published on 31 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
baserCMS is a website development framework. Prior to version 5.2.3, baserCMS has DOM-based cross-site scripting in tag creation. This issue has been patched in version 5.2.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-32734?
2 open source packages ship an affected version, including baserproject/basercms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
baserproject/basercms Packagist | All versions | 5.2.3 |
baserproject/basercms Packagist | All versions | 5.2.3 |
Products include Basercms Basercms.
How do I fix CVE-2026-32734?
Upgrade baserproject/basercms to 5.2.3 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-2026-32734 being exploited?
There is no known exploitation of CVE-2026-32734 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-677c-xv24-crgx.