CVE-2019-25337

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.

CVSS v4.0

5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2026-02-12

Updated

2026-07-15

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/47745

References

• CVE Record
• NVD entry

Related

• CVE-2019-25336
• CVE-2019-25338
• CVE-2019-25335
• CVE-2019-25339
• CVE-2019-25334
• CVE-2019-25340