CVE-2020-15273 Cross-Site Scripting in baserCMS

What is CVE-2020-15273?

CVE-2020-15273 is a high-severity cross-site scripting vulnerability in Basercms Basercms, published on 30 Oct 2020. An attacker needs administrator access to exploit it, 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. The issue affects the following components: Edit feed settings, Edit widget area, Sub site new registration, New category registration. Arbitrary JavaScript may be executed by entering specific characters in the account that can access the file upload function category list, subsite setting list, widget area edit, and feed list on the management screen. The issue was introduced in version 4.0.0. It is fixed in version 4.4.1.

Weakness: CWE-79

Which versions are affected by CVE-2020-15273?

2 open source packages ship an affected version, including baserproject/basercms. It affects 1 product.

Products include Basercms Basercms.

How do I fix CVE-2020-15273?

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-2020-15273 being exploited?

There is no known exploitation of CVE-2020-15273 in the wild and no public exploit code.

Other vulnerabilities in Basercms Basercms

• CVE-2023-25654 baserCMS File Uploader Remote Code Execution (RCE) vulnerability Critical 9.8
• CVE-2023-25655 baserCMS allows any file to be uploaded Critical 9.8
• CVE-2017-10842 baserCMS SQL Injection vulnerability Critical 9.8
• CVE-2026-30880 baserCMS: OS command injection vulnerability in installer Critical 9.2
• CVE-2026-21861 baserCMS: OS Command Injection Leading to Remote Code Execution (RCE) Critical 9.1

All Basercms Basercms vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wpww-4jf4-4hx8.