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XenForo < 2.3.13 Payment Replay via PayPal REST Payment Provider

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-73316

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-73316

XenForo

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "XenForo",
    "product": "XenForo",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.3.13",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-73316

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#5481 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement