Tickera Blind SQL Injection CVE-2026-105889 Threatens Versions Through 3.6.0.6 With Database Exposure

A critical security vulnerability has been identified in the Tickera Event Ticketing System, exposing organizations to significant data breach risks. The flaw, rated 9.3 on the CVSS scale, enables blind SQL injection attacks that can compromise database integrity and confidentiality.

What happened

The National Vulnerability Database recorded CVE-2026-105889 as a critical severity issue affecting the Tickera plugin. This vulnerability stems from improper neutralization of special elements used in SQL commands, specifically categorized under CWE-89. Attackers can exploit this weakness to perform blind SQL injection, a technique where the application does not return direct data but provides indirect clues about the database structure.

The issue impacts all versions of the Tickera Event Ticketing System from its initial release through version 3.6.0.6. According to the NVD record, the flaw allows unauthorized users to manipulate SQL queries. This manipulation can lead to the extraction of sensitive information stored within the underlying database. The specific mechanism involves sending crafted inputs that trigger boolean-based or time-based responses from the server.

Why it matters

For business leaders and software developers, this vulnerability presents a severe operational risk. Blind SQL injection is particularly dangerous because it can be automated and executed without triggering obvious application errors. Attackers can systematically guess database contents, including user credentials, payment details, and event registration records.

Organizations using Tickera up to version 3.6.0.6 are directly exposed to this threat. The high CVSS score of 9.3 indicates that successful exploitation requires no complex prerequisites. This means that any unauthenticated or low-privilege user could potentially initiate an attack. The lack of a confirmed patch in the provided source material leaves these systems in a vulnerable state.

The exposure extends to any web property hosting the affected plugin. Since the flaw exists in the core ticketing functionality, it affects the primary business logic of the site. This increases the attack surface for malicious actors targeting e-commerce or event management platforms. The potential for data loss and regulatory non-compliance is significant if sensitive customer data is exfiltrated.

What to watch

• Monitor server logs for unusual query patterns or delayed responses.
• Check for unauthorized database access attempts or new user accounts.
• Review web application firewall rules for SQL injection signatures.
• Assess the exposure of any public-facing forms connected to the plugin.

Background: CVSS score

CVSS provides a standardized vector for exploit difficulty and access requirements, not business value. A high score indicates an easy attack path, not necessarily significant damage. You must contextualize the score with your environment’s exposure, asset value, and compensating controls to determine true risk.

Read the full guide: CVSS Scores: Why High Numbers Mislead Your Risk Assessment

What to do and how to stay safe: Tickera

• Audit all installations of the Tickera Event Ticketing System to identify versions up to 3.6.0.6.
• Implement strict input validation on all forms interacting with the database.
• Use web application firewalls to filter out common SQL injection payloads.
• Monitor database logs for anomalous query execution times or boolean responses.

General security guidance from the Firewall Chronicle newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

Which versions of Tickera are affected by CVE-2026-105889?

All versions of the Tickera Event Ticketing System from its initial release through version 3.6.0.6 are affected.

What is the severity rating of this vulnerability?

The National Vulnerability Database rates CVE-2026-105889 as critical with a CVSS score of 9.3.

Is there a patch available for this SQL injection flaw?

No fix has been confirmed yet in the available source material for this specific vulnerability.