Security Alert Summary
The Tickera WordPress plugin prior to version 3.6.0.4 fails to correctly verify the integrity of incoming payment notifications. The validated signature does not cover the order or the amount, which allows unauthenticated attackers to forge payment confirmations and mark arbitrary orders as paid without making a payment.
CVE Details
- CVE ID:
CVE-2026-88998 - Affected component: Tickera WordPress plugin
- Affected versions: Versions before 3.6.0.4
- Published: October 14, 2026 at 11:17:07 AM UTC
- Last modified: October 14, 2026 at 4:14:02 PM UTC
- CVSS v3.1: Base Score 5.3, MEDIUM — Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Attack vector: Network
- Attack complexity: Low
- Authentication requirements: None (unauthenticated)
- Privileges required: None
- User interaction: None
- Impact: Integrity impact: Low; Confidentiality impact: None; Availability impact: None
- CWE / Weakness: CWE-345 (Insufficient Verification of Data Integrity)
Technical Details
According to the advisory, Tickera prior to 3.6.0.4 does not correctly verify the integrity of incoming payment notifications. The implementation validates a signature but the signature does not cover critical fields such as the order identifier or the payment amount. Because those fields are not protected by the validated signature, an unauthenticated attacker can craft a payment notification that appears valid and cause the plugin to mark arbitrary orders as paid.
The description does not name specific functions, endpoints, or code paths. Based on the available information, the root cause is an incomplete integrity check on incoming payment data: the signature validation step omits order or amount fields from its coverage. The direct impact is incorrect order state transitions (orders marked as paid) without a corresponding legitimate payment.
How This Could Impact Your Website
Consider a small team running event ticketing where the site owner, an internal staff member managing orders, and an external contractor handling payment reconciliation all have distinct roles. If an attacker forges a payment notification, the site could mark a ticket order as paid even though no payment was received. Practical consequences include:
- Financial discrepancies: accounting and reconciliation processes may show paid orders that are fraudulent.
- Operational disruption: staff may fulfill or reserve tickets based on false payment status, causing inventory and customer service issues.
- Increased risk of targeted social engineering: while the vulnerability itself does not directly disclose confidential data, manipulated order records or confirmation workflows could be used to craft convincing phishing attempts that target staff or customers, depending on how order information is exposed by your site.
If you\’re unsure whether your site is affected or how to assess your current user roles and plugins, it may be worth having a professional review.
Recommended Actions
- Update the affected plugin as soon as a patched version is available.
- Review and reduce unnecessary user roles, especially contributor-level accounts and any accounts used by external contractors.
- Enforce strong passwords and enable two-factor authentication for editors and administrators.
- Remove unused or unmaintained plugins to reduce your attack surface.
- Monitor site activity and order workflows for unusual behavior, such as unexpected status changes or reconciliation mismatches.
If you\’d like help reviewing your plugins, user roles, or overall WordPress security posture, our team at Freshy is happy to help.
