What’s Vulnerable › Vulnerabilities

CVE-2019-25337: OwnCloud 8.1.8 - Username Disclosure

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-12 · updated 2026-06-17
• Weakness: CWE-203

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.

Affected products

• ownCloud: 8.1.8

References

• https://ftp.icm.edu.pl/packages/owncloud/
• https://owncloud.org/
• https://www.exploit-db.com/exploits/47745
• https://www.vulncheck.com/advisories/owncloud-username-disclosure

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