CVE-2026-88998 Tickera CVE debrief

Who should care

Defenders responsible for WordPress installations using the Tickera plugin should assess exposure and prioritize verification of payment notification integrity. This includes reviewing the plugin's configuration and security controls, verifying the integrity of incoming payment notifications, and ensuring that the validated signature covers the order and amount. Additionally, defenders should consider implementing additional logging and monitoring to

Why it matters

CVE-2026-88998 is a medium-severity vulnerability in the Tickera WordPress plugin that allows unauthenticated attackers to forge payment confirmations, potentially leading to financial losses. Defenders responsible for WordPress installations using the Tickera plugin should assess exposure and prioritize verification of payment notification integrity.

• Defenders must verify payment notification integrity to prevent unauthorized order modifications.
• Unauthenticated attackers can forge payment confirmations, potentially leading to financial losses.
• Defenders should prioritize patching or mitigating the vulnerability to prevent exploitation.
• Additional monitoring and logging may be necessary to detect suspicious payment activity.

Technical summary

The Tickera WordPress plugin before version 3.6.0.4 does not correctly verify the integrity of incoming payment notifications, and the validated signature does not cover the order or the amount, allowing unauthenticated attackers to forge a payment confirmation and mark arbitrary orders as paid without paying. The plugin's failure to validate the integrity of incoming payment notifications and the lack of coverage of the order and amount in the validated signature enable attackers to exploit this vulnerability. Defenders should prioritize verifying the integrity of incoming payment notifications and ensuring that the validated signature covers the order and amount.

Defensive priority

Defenders should prioritize verifying the integrity of incoming payment notifications and ensuring that the validated signature covers the order and amount.

Recommended defensive actions

• Verify the integrity of incoming payment notifications
• Ensure validated signatures cover order and amount
• Restrict access to payment notification functionality
• Monitor for suspicious payment activity
• Implement additional logging and monitoring to detect potential exploitation
• Review and update incident response plans to address potential financial losses
• Conduct a thorough review of the plugin's configuration and security controls

Evidence notes

The CVE record and source item provide details on the vulnerability, but additional information from the vendor and other sources may be necessary to fully understand the impact and mitigation. The vulnerability is caused by the plugin's failure to correctly verify the integrity of incoming payment notifications, and the validated signature does not cover the order or the amount. This allows unauthenticated attackers to forge a payment confirmation and mark arbitrary orders as paid without paying. The vendor has released a patch for 3

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.