HIGHVulnerability
CVE-2026-73315
XenForo before 2.3.13 contains a server-side request forgery vulnerability in the PayPal REST webhook handler that allows unauthenticated attackers to cause the server to make outbound HTTP requests to arbitrary destinations by supplying a crafted certificate URL in webhook headers without scheme, hostname, or allowlist validation. Attackers can submit a crafted POST to the PayPal webhook callback endpoint to reach internal network resources including cloud instance metadata services, potentially disclosing IAM credentials or enabling secondary internal service exploitation.
Properties
- severity
- HIGH
- score
- 8.6
- cve_id
- CVE-2026-73315
- signal_observed_at
- 2026-09-16T21:37:07+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- published_at
- 2026-09-08T14:17:25.780
- last_modified
- 2026-09-11T20:31:26.440
Related Entities (3)
HAS_WEAKNESS (1)
→[Weakness]Server-Side Request Forgery (SSRF)
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
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