{"id":"CVE-2026-110765","published":"2026-10-14T19:17:12.313","lastModified":"2026-10-15T14:47:05.720","description":"FlexPrice through 2.1.38 contains an authentication bypass vulnerability in HandleQuickBooksWebhook that skips signature verification when the intuit-signature header is omitted. Unauthenticated attackers knowing a tenant and environment ID can replay forged payment notifications to repeatedly add payment amounts, marking invoices paid or overpaid.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-347"],"vendors":[],"products":[],"references":[{"url":"https://github.com/flexprice/flexprice","tags":[]},{"url":"https://github.com/flexprice/flexprice/blob/f27da32f84ee34bad4bf39a8d887af87fc3f30fc/internal/api/v1/webhook.go#L750","tags":[]},{"url":"https://hackmd.io/@hieuPenguinnn/flexprice-quickbooks-webhook-signature-bypass","tags":[]},{"url":"https://www.vulncheck.com/advisories/flexprice-through-2.1.38-quickbooks-webhook-signature-verification-bypass","tags":[]}],"exploitRefs":[{"url":"https://github.com/flexprice/flexprice","tags":[]},{"url":"https://github.com/flexprice/flexprice/blob/f27da32f84ee34bad4bf39a8d887af87fc3f30fc/internal/api/v1/webhook.go#L750","tags":[]}],"hasPoc":true,"ai":null}