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Description

OwnCloud 8.1.8 contains a username enumeration vulnerability that allows remote attackers to discover user accounts by manipulating the share.php endpoint. Attackers can send crafted GET requests to /index.php/core/ajax/share.php with a wildcard search parameter to retrieve comprehensive user information.

PUBLISHED Reserved 2026-02-12 | Published 2026-02-12 | Updated 2026-02-13 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Observable Discrepancy

Product status

8.1.8
affected

Credits

Daniel Moreno finder

References

www.exploit-db.com/exploits/47745 (ExploitDB-47745) exploit

owncloud.org/ (OwnCloud Official Homepage) product

ftp.icm.edu.pl/packages/owncloud/ (OwnCloud Software Download Repository) product

www.vulncheck.com/advisories/owncloud-username-disclosure (VulnCheck Advisory: OwnCloud 8.1.8 - Username Disclosure) third-party-advisory

cve.org (CVE-2019-25337)

nvd.nist.gov (CVE-2019-25337)

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