Alto (Vebra / Zoopla) · Vulnerability Disclosure

Alto Vebra Vulnerability Disclosure

Vulnerability disclosure

Alto (Vebra / Zoopla) runs a coordinated vulnerability disclosure program on Hackerone. A machine-readable /.well-known/security.txt is served. A dedicated security contact is published.

Real-EstateUnited KingdomPropTechProperty ListingsCRMProperty ManagementRentalsConveyancingEstate AgencyTenancyWebhookEventLettingsSales ProgressionProperty DataReal Estate Software

Program: Hackerone security.txt present

Disclosure Policy

Policy

https://www.zoopla.co.uk/vulnerability-disclosure/

Security Contact

Contact

https://www.zoopla.co.uk/vulnerability-disclosure/

Contact

connectsupport@altosoftwaregroup.co.uk

Source

Vulnerability Disclosure

generated: '2026-07-26'
method: searched
probe: true
summary: >-
  Alto itself publishes no vulnerability-disclosure policy: neither vebraalto.com,
  altosoftware.co.uk nor the Alto API hosts serve a security.txt, and no responsible-disclosure
  page exists on the Alto marketing site or the developer portal. The Zoopla side of this
  estate does have one — zoopla.co.uk (the registrable domain the Zoopla Leads, Premium Listing
  and WFP APIs sit under) serves an RFC 9116 security.txt whose Contact is a public
  vulnerability-disclosure page. Security questions for the Alto API itself are routed through
  the partner support mailbox, not a disclosure programme.
policy:
- https://www.zoopla.co.uk/vulnerability-disclosure/
contact:
- https://www.zoopla.co.uk/vulnerability-disclosure/
- connectsupport@altosoftwaregroup.co.uk
security_txt:
  url: https://www.zoopla.co.uk/.well-known/security.txt
  status: 200
  canonical: https://www.zoopla.co.uk/.well-known/security.txt
  expires: '2026-02-04T02:00:00Z'
  stale: true
  note: The Expires field had already elapsed when fetched on 2026-07-26; RFC 9116 treats an
    expired file as no longer valid.
  file: well-known/alto-vebra-security.txt
bug_bounty:
  program: none found
  platforms_checked:
  - hackerone.com
  - bugcrowd.com
  - intigriti.com
evidence:
- source: https://www.zoopla.co.uk/.well-known/security.txt
  kind: security.txt
  status: 200
- source: https://zoopla.co.uk/.well-known/security.txt
  kind: security.txt
  status: 200
  note: apex serves the same document, declaring the www host canonical
- source: https://www.zoopla.co.uk/vulnerability-disclosure/
  kind: disclosure-page
  status: 403
  note: Cloudflare JavaScript interstitial blocks anonymous fetch; the URL is the declared
    Contact in the live security.txt
- source: https://www.altosoftware.co.uk/.well-known/security.txt
  kind: security.txt
  status: 404
- source: https://id.vebraalto.com/.well-known/security.txt
  kind: security.txt
  status: 404
- source: https://api.alto.zoopla.co.uk/.well-known/security.txt
  kind: security.txt
  status: 404

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