Is CVE-2026-73316 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-73316?

CVE-2026-73316 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-73316

Description

XenForo before 2.3.13 contains a payment replay vulnerability in the PayPal REST payment provider that allows attackers to process the same webhook payload multiple times by exploiting a missing duplicate transaction ID check. Attackers can replay a valid webhook payload to trigger duplicate payment events, resulting in repeated subscription activations and unauthorized account upgrades.