CVE-2019-25337 OwnCloud 8.1.8 - Username Disclosure
Remote attackers can enumerate user accounts and retrieve user information via the share.php endpoint in OwnCloud.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25337?
CVE-2019-25337 is a medium-severity vulnerability in OwnCloud, published on 12 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-203
Which versions are affected by CVE-2019-25337?
How do I fix CVE-2019-25337?
No fix has been published for CVE-2019-25337 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-25337 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25337 exists.
Sources
Also known as GHSA-v5m9-phxh-m6wj.