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CVE-2026-63047 – Unauthenticated Invoice Disclosure – Events Booking for Joomla versions 5.0–5.8.1

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Summary

CVE-2026-63047 is a high-severity improper access control vulnerability affecting the Events Booking extension for Joomla by JoomDonation, versions 5.0 through 5.8.1. The flaw allows unauthenticated remote attackers to download invoice information belonging to arbitrary users without any authorization, exposing personally identifiable information stored in event registration records. The vulnerability carries a CVSS v3.1 base score of 7.5 (High).

Technical details

  • Root cause: The extension failed to verify whether the requesting actor was authorized to access a given invoice (CWE-284: Improper Access Control). No ownership or session check was enforced on the invoice download endpoint before serving the requested document.
  • Trigger conditions: An unauthenticated HTTP request to the vulnerable invoice download endpoint, supplying a target invoice identifier, is sufficient to trigger the flaw. No existing account, active session, or elevated privilege is required.
  • Attack vector: Fully remote and network-accessible (AV:N, AC:L, PR:N, UI:N). Any anonymous party with network access to an affected Joomla site can exploit the endpoint directly.
  • Impact: Successful exploitation enables arbitrary retrieval of any registered user’s invoice. Event booking invoices typically contain PII such as full names, email addresses, phone numbers, and postal addresses, as well as records of financial transactions processed through the extension’s integrated payment gateways. This constitutes an unauthorized information disclosure incident with High confidentiality impact and no integrity or availability impact.

Affected software

  • Events Booking extension for Joomla by JoomDonation — versions 5.0 through 5.8.1 (inclusive)

Severity

  • CVSS v3.1 Base Score: 7.5 (High)
  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Update the Events Booking extension to version 5.8.2 or later. JoomDonation released version 5.8.2 on July 22, 2026 — the same date as CVE publication — addressing this vulnerability.
  • If immediate patching is not feasible: Restrict public access to the invoice download functionality at the web server or WAF level until the extension can be patched. Review recent access logs for unauthorized or anomalous invoice download requests targeting other users’ records.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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