HIGHVulnerability
CVE-2026-73316
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.
Properties
- severity
- HIGH
- score
- 7.5
- cve_id
- CVE-2026-73316
- signal_observed_at
- 2026-09-16T21:37:07+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- published_at
- 2026-09-08T14:17:25.923
- last_modified
- 2026-09-11T20:31:36.417
Related Entities (3)
HAS_WEAKNESS (1)
→[Weakness]Insufficient Verification of Data Authenticity
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
Explore deeper with Ninja Signal's threat intelligence graph