# CVE-2026-93464: baserCMS stored cross-site scripting in custom content descriptions

Source: https://junglewise.ai/threats/cve-2026-93464-stored-cross-site-scripting-via-custom-content-descriptions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-30. Updated: 2026-09-30  
License: CC BY 4.0 with a link back

CVE-2026-93464 · Severity: medium · CVSS 5.4 · Published 2026-09-30

baserCMS is a content management system used to build and manage websites. A stored cross-site scripting vulnerability in custom content description fields allows an attacker with admin panel access to inject malicious scripts that execute in the browsers of site visitors, potentially leading to account takeover, data theft, or malware distribution.

Technologies: [baserCMS User Community baserCMS](https://junglewise.ai/threats/technologies/basercms-user-community-basercms). Vendors: [baserCMS User Community](https://junglewise.ai/threats/vendors/basercms-user-community).

## Quick answers

**Is CVE-2026-93464 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93464 being exploited in the wild.

**How severe is CVE-2026-93464?** Medium severity, with a CVSS score of 5.4, published 30 September 2026.

**Which products and versions are affected?** baserCMS User Community baserCMS 5.0.0 through 5.4.0.

**Is there a fix for CVE-2026-93464?** A patch was published on 2026-09-24: Version 5.4.1 and 5.3.1 or later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-93464 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-93464?** Check whether you run baserCMS User Community baserCMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored XSS vulnerability exists in the custom content description functionality due to insufficient input sanitization. The vulnerability requires authentication to the admin panel and user interaction (a visitor viewing the affected content), allowing an authenticated attacker to persist malicious JavaScript that executes in end-user browsers. A patch is available in version 5.4.1 or 5.3.1 and later.

## Affected products

- baserCMS User Community baserCMS 5.0.0 through 5.4.0

## Timeline

- 2026-09-24: disclosed
- 2026-09-24: patched: Version 5.4.1 and 5.3.1 or later

## References

- [https://basercms.net/security/JVN_14353754](https://basercms.net/security/JVN_14353754)
- [https://jvn.jp/en/jp/JVN14353754](https://jvn.jp/en/jp/JVN14353754)

## Related threats

- [baserCMS script validation bypass cross-site scripting](https://junglewise.ai/threats/cve-2026-93463-cross-site-scripting-via-script-validation-bypass-exists-in)
- [baserCMS missing authentication for blog comments API](https://junglewise.ai/threats/cve-2026-93462-missing-authentication-for-critical-function-vulnerability-exists)
- [baserCMS stored cross-site scripting in email form fields](https://junglewise.ai/threats/cve-2026-93460-stored-cross-site-scripting-via-appended-strings-in-email-form)