CVE-2026-63101 — Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint
Open Event Server through 1.19.1 contains a missing authentication vulnerability that allows unauthenticated attackers to export the complete member roster of any group, includi…
Published: 2026-07-17 · CVSS: 8.7 · CVSS 4.0
Open Event Server through 1.19.1 contains a missing authentication vulnerability that allows unauthenticated attackers to export the complete member roster of any group, including email addresses, names, join dates, and roles, by submitting requests to the group followers CSV export endpoint which lacks any authentication decorator. Attackers can enumerate sequential group IDs via brute-force, trigger an export via the unauthenticated POST endpoint, then poll the unauthenticated task status endpoint until completion to retrieve a download URL containing the full member CSV.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7