Zulip is an open-source team collaboration tool. The API for deleting an organization custom profile field is supposed to be restricted to organization administrators, but its handler failed to check that the field belongs to the same organization as the user. Therefore, an administrator of any organization was incorrectly allowed to delete custom profile fields belonging to a different organization. This is fixed in Zulip Server 10.1.
CVE ID: CVE-2025-30369
CVSS Base Severity: LOW
CVSS Base Score: 2.7
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Vendor: zulip
Product: zulip
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 7.82% (scored less or equal to compared to others)
EPSS Date: 2025-04-18 (when was this score calculated)