CVE-2026-73314

XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported authalgo header value. When the algorithm cannot be mapped to a...

EUVD-2026-72785

XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported authalgo header value. When the algorithm cannot be mapped to a...

CVE-2026-73314

XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler . When an unauthenticated attacker submits a webhook request with an unsupported auth_algo header value, the verification function incorrectly returns true instead of failing, causing the system...

CVE-2026-73314 XenForo < 2.3.13 Signature Verification Bypass via PayPal REST Webhook

XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported authalgo header value. When the algorithm cannot be mapped to a...

CVE-2026-73314: Improper Check for Unusual or Exceptional Conditions

XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported authalgo header value. When the algorithm cannot be mapped to a...