[{"data":1,"prerenderedAt":170},["ShallowReactive",2],{"publication:en:P080":3},{"meta":4,"copy":17,"relatedArticles":141,"terms":162,"term":163,"resourceParent":164,"glossaryParent":167},{"id":5,"path":6,"kind":7,"keyword":8,"title":9,"seoTitle":10,"description":11,"incoming":12,"updated":15,"preparedOn":16},"P080","\u002Fblog\u002Fwebhook-security","article","webhook security checklist","Webhook security checklist: verify events and business effects","Webhook security checklist: signatures and processing","Review webhook signatures, request bytes, replay and duplicate handling, event scope and durable processing. Test the business result with synthetic events.",[13,14],"\u002Fservices\u002Fcrm-integrations","\u002Fservices\u002Fsecurity-audit","2026-06-24","2026-10-30",{"intro":18,"sections":19,"checklistTitle":91,"checklist":92,"faq":100,"sources":110,"links":116,"cta":136},"A webhook security checklist should cover provider-specific delivery verification, accepted event scope, replay and duplicate handling, durable processing and the resulting business action. Verify the signature before acting, using the correct endpoint secret and exact input required by the provider. A valid signature or an HTTP success response does not by itself prove the event was processed safely or correctly.",[20,25,37,73,78,86],{"title":21,"paragraphs":22},"Map the sender, receiving endpoint and business effect",[23,24],"Identify the actual event provider, account, environment and endpoint owner. Record which event types the integration needs and what each is allowed to change: an order state, CRM record, notification or other defined business result. A callback URL left from an old plugin or agency project should have a current owner and purpose before it receives new access.","Separate browser forms from server-to-server deliveries. They may use different authentication and request-defense mechanisms. A delivery that does not carry a browser CSRF token is not automatically insecure, but it still needs the provider's supported verification and the application's own business checks. Do not exempt unrelated user actions from protection merely because they share a server with a webhook endpoint.",{"title":26,"paragraphs":27,"sources":30},"Verify the exact provider-defined signature input before action",[28,29],"Use the provider's supported library and current verification procedure. Stripe requires the raw request body for its signature verification, so middleware that transforms the payload can change the input and cause failure. The configured endpoint secret and environment must match the received delivery. A secret API key and a webhook signing secret are not interchangeable simply because both are sensitive values.","GitHub documents its own signing scheme and safe comparison requirements. Use that guidance for GitHub rather than copy one provider's header, algorithm or payload rules to another service. Reject unverified deliveries before business effects. If verification fails, inspect the body-handling and configuration path using synthetic evidence instead of disabling the check to make the integration work.",[31,34],{"label":32,"url":33},"Stripe: signature verification, duplicate events and processing","https:\u002F\u002Fdocs.stripe.com\u002Fwebhooks",{"label":35,"url":36},"GitHub: validating webhook deliveries","https:\u002F\u002Fdocs.github.com\u002Fen\u002Fwebhooks\u002Fusing-webhooks\u002Fvalidating-webhook-deliveries",{"title":38,"paragraphs":39,"table":42},"Treat authenticity, freshness and duplicate effects as separate checks",[40,41],"A valid signature establishes the appropriate signed-message relationship under that scheme; it does not automatically establish freshness or that the business action should run again. Where the provider's scheme supports timestamps or replay checks, follow those controls. Track the appropriate event and business identifiers so repeated deliveries do not create unintended duplicate actions.","Stripe documents retries, possible duplicate events and lack of a guaranteed delivery order. Those are its documented behaviors, not a universal schedule for every sender. Design around the actual provider and integration. Decide how the application handles a repeated delivery, an older event and the latest object state, especially when several events can refer to the same order or customer.",{"caption":43,"headers":44,"rows":48},"Webhook delivery and business-effect acceptance",[45,46,47],"Stage","Control or evidence","Acceptance question",[49,53,57,61,65,69],[50,51,52],"Delivery source","Provider, account, endpoint and environment.","Is this the integration the business approved?",[54,55,56],"Verification","Exact input, signature and matching endpoint secret.","Are invalid deliveries rejected before effects?",[58,59,60],"Event scope","Supported type, version and expected object relationship.","May this event change this business record?",[62,63,64],"Repeat and order","Processed-event and business-action records.","Does repeat or delayed delivery avoid unintended effects?",[66,67,68],"Processing","Validated durable receipt and accountable worker.","Can accepted work be recovered after a failure?",[70,71,72],"Outcome","Reconciled synthetic order or connected record.","Did the intended business result happen once as required?",{"title":74,"paragraphs":75},"Validate the object and authorize the business transition",[76,77],"Check the expected event type, schema or version, environment and relationship to the business record. A signed event from an approved provider still needs interpretation. An event referring to another account, an unexpected object or a transition the application should not accept must not become permission to alter arbitrary records.","Decide which information is trusted from the event and when the provider's current object should be retrieved through an authorized API call. Keep account scope and credentials limited. Validate any configured outbound destination separately rather than let untrusted payload content choose where the server sends sensitive data. Verification of the incoming message is not a blanket authorization for every subsequent operation.",{"title":79,"paragraphs":80,"example":83},"Acknowledge only after the accepted work is recoverable",[81,82],"Keep signature and basic validation before acceptance, then use an appropriate durable processing design for longer work. A quick success response should not discard the only event copy while the business action exists only in temporary memory. Define how a worker failure is retried and which operator notices work that remains unprocessed.","Use provider-supported synthetic events to test invalid verification, a permitted event, duplicate delivery and a controlled downstream failure where relevant. Record the delivery result and the application result separately. A successful HTTP response can mean the receiver accepted work without proving the CRM update or order transition finished. Reconcile the final business record rather than close the test at transport success.",{"title":84,"text":85},"Illustrative duplicate-effect failure","The same valid synthetic event is delivered twice. Signature checks pass both times, but the integration must avoid an unintended second fulfillment action. Authentic delivery and safe repeat processing are distinct acceptance questions.",{"title":87,"paragraphs":88},"Protect the lifecycle, evidence and maintenance ownership",[89,90],"Store signing secrets through the approved server-side arrangement and use the provider's supported rotation procedure. Record endpoint changes and environment ownership without exposing private values. Keep logs useful for tracing event IDs and failures while minimizing sensitive payload retention. Decide who handles a failed queue, repeated provider errors or an obsolete endpoint after a supplier departure.","CyberFixCrew is an Israeli cybersecurity company serving businesses worldwide with practical Israeli knowledge of websites, CRM connections and digital infrastructure. We can scope integration review and supported corrections with the application owner. The handover connects verified delivery, reliable processing and the accepted business outcome so an operational success code is not mistaken for complete correctness.","Webhook security and processing acceptance",[93,94,95,96,97,98,99],"Provider, account, endpoint and environment identified","Signature checked before business effects","Exact input and matching endpoint secret preserved","Event scope and business-record relationship validated","Replay and duplicate behavior reviewed separately","Accepted work retained durably with a recovery owner","Synthetic delivery reconciled with the final business result",[101,104,107],{"question":102,"answer":103},"Does HTTPS replace webhook signature verification?","HTTPS protects the connection; it does not establish every provider-specific message-authentication requirement. Use the sender’s supported verification scheme and correct endpoint configuration, then validate the event’s business scope.",{"question":105,"answer":106},"Can a valid signed event be processed twice?","Yes, depending on delivery behavior and application design. Authenticity does not prevent duplicate business effects. Use the appropriate event and business identifiers and test the intended repeat-processing behavior with synthetic events.",{"question":108,"answer":109},"Is an HTTP success code proof that the order or CRM record changed?","No, it can indicate receipt or acceptance at one stage. Verify durable processing and reconcile the final application result. Keep transport, queue and business-operation evidence distinct in the test and handover.",[111,112,113],{"label":32,"url":33},{"label":35,"url":36},{"label":114,"url":115},"OWASP: secret storage, lifecycle and exposure boundaries","https:\u002F\u002Fcheatsheetseries.owasp.org\u002Fcheatsheets\u002FSecrets_Management_Cheat_Sheet.html",[117,120,123,126,129,131,133],{"path":118,"label":119},"\u002Fblog\u002Fapi-keys-secrets","Review signing secrets and API credential paths",{"path":121,"label":122},"\u002Fblog\u002Fshop-checkout-after-update","Verify callbacks in a controlled order test",{"path":124,"label":125},"\u002Fglossary\u002Fcsrf","Distinguish browser request defenses",{"path":127,"label":128},"\u002Fglossary\u002Fleast-privilege","Limit integration permissions and record scope",{"path":13,"label":130},"Scope connected application and CRM work",{"path":14,"label":132},"Agree an authorized integration review",{"path":134,"label":135},"\u002Fblog\u002Fapi-security-business-checklist","Review the wider API identity and permission boundary",{"title":137,"description":138,"button":139,"type":140},"Check the path from received event to business result","Describe the sender, receiver and unexpected behavior without sharing secrets or customer payloads. We can define the review and synthetic acceptance checks.","Discuss webhook security","check",[142,149,156],{"id":143,"path":118,"title":144,"description":145,"category":146,"artwork":146,"order":147,"publishedOn":148},"P079","How to store API keys securely on a website and manage exposure","Distinguish public identifiers from secret API keys, review server and build exposure, limit permissions and plan supported rotation with integration checks.","integrations",93,"2026-07-10",{"id":150,"path":151,"title":152,"description":153,"category":146,"artwork":146,"order":154,"publishedOn":155},"P196","\u002Fblog\u002Fthird-party-script-data-flow","Third party script data privacy: inspect the actual browser data flow","Map third party scripts, tag managers and browser data flows. Distinguish CSP, integrity and consent checks, then test approved changes with synthetic data.",77,"2026-06-08",{"id":157,"path":134,"title":158,"description":159,"category":146,"artwork":146,"order":160,"publishedOn":161},"P119","API security checklist for business integrations","Review API identities, record and action permissions, resource limits, secrets and webhooks. Define controlled acceptance with synthetic accounts and data.",69,"2026-05-23",[],null,{"path":165,"label":166},"\u002Fresources","Website security resources and templates",{"path":168,"label":169},"\u002Fglossary","Cybersecurity glossary for small businesses",1794134058244]