Frappe is a full-stack web application framework. Prior to 15.115.0 and 16.27.0, the public request-data web form and PersonalDataDownloadRequest class in frappe/website/doctype/personal_data_download_request/personal_data_download_request.py return distinguishable response shapes for registered and unregistered email addresses, including the user_name field and persistence behavior. A remote attacker can compare the responses to enumerate registered users. This issue is fixed in versions 15.115.0 and 16.27.0.
https://github.com/frappe/frappe/security/advisories/GHSA-c2xv-c53h-qvr5
https://github.com/frappe/frappe/releases/tag/v16.27.0
https://github.com/frappe/frappe/releases/tag/v15.115.0
https://github.com/frappe/frappe/pull/40815
https://github.com/frappe/frappe/pull/40814
https://github.com/frappe/frappe/pull/40787
https://github.com/frappe/frappe/commit/4b32a4e0072e61ce0abcb0d09cfd1f14724fe896
https://github.com/frappe/frappe/commit/47a396ec59f5362029feb349eb2b9d10a21afcf8
https://github.com/frappe/frappe/commit/30fe0b4118ff94c95c239dce4bc74ec4ca10a827
Published: 2026-08-20
Updated: 2026-08-21
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Severity: Medium
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.00468