CVE-2026-100145 Synchrony Financing CVE debrief

Who should care

Defenders responsible for WordPress installations with the Synchrony Financing plugin, particularly those using versions 1.0.5 to 1.1.1, should assess exposure and apply necessary mitigations. This includes verifying the exposure of affected plugin versions, applying compensating controls, and monitoring for suspicious activity related to order modifications and customer data access. Security teams and vulnerability management teams should prioritize this

Why it matters

Unauthenticated order takeover vulnerability in Synchrony Financing WordPress plugin allows attackers to modify orders and access customer data, requiring defenders to verify exposure and apply compensating controls.

• Order reassignment and modification by unauthenticated attackers
• Access to customer personal data
• Potential for data tampering and unauthorized order changes

Technical summary

The Synchrony Financing WordPress plugin before 1.1.2 does not properly authorize requests to the admin_order_callback REST route, allowing unauthenticated attackers to reassign orders, modify details, and access customer personal data. This vulnerability is caused by inadequate authorization checks in the plugin's REST route implementation. Defenders should prioritize verifying exposure of Synchrony Financing plugin versions 1.0.5 to 1.1.1 and applying compensating controls to restrict access to the admin_order_callback REST route.

Defensive priority

Defenders should prioritize verifying exposure of Synchrony Financing plugin versions 1.0.5 to 1.1.1 and applying compensating controls to restrict access to the admin_order_callback REST route.

Recommended defensive actions

• Verify exposure of Synchrony Financing plugin versions 1.0.5 to 1.1.1 in managed environments.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Monitor for suspicious activity related to order modifications and customer data access.

Evidence notes

The CVE record and source item provide details on the vulnerability, but vendor confirmation and additional impact information are limited. Defenders should verify the exposure of Synchrony Financing plugin versions 1.0.5 to 1.1.1 and apply compensating controls to restrict access to the admin_order_callback REST route. The source item provides details on the vulnerability, but additional information from the vendor is needed to fully understand the impact.

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.