CVE-2026-73314

Katalog CVE

CVSS 7.5 · High EPSS 0,65%

Kerentanan Improper Check for Unusual or Exceptional Conditions pada xenforo. Skor CVSS 3.1 7.5 (High) menurut vulncheck.com.

Deskripsi (NVD)

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 auth_algo header value. When the algorithm cannot be mapped to a supported hash function, the verification function incorrectly returns true instead of failing, causing the caller to treat the fabricated request as verified and process the payment event without a valid PayPal signature.

Rincian

Terbit di NVD

8 September 2026

Terakhir diubah

11 September 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-754: Improper Check for Unusual or Exceptional Conditions

EPSS (30 hari)

0,65% peluang dieksploitasi; lebih tinggi dari 49,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bombobombone.github.io/posts/cve-2026-73314/ exploit · advisory pihak ketiga
• https://github.com/BomboBombone/CVE-2026-73314 exploit · advisory pihak ketiga
• https://www.vulncheck.com/advisories/xenforo-signature-verification-bypass-via-paypal-rest-webhook advisory pihak ketiga
• https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-gallery-versions-2-2-0... release notes
• https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-security-fixes.239857/ release notes