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TI-2019-15391 Aliases CVE-2019-25337GHSA-v5m9-phxh-m6wj

OwnCloud 8.1.8 - Username Disclosure

Priority HIGH 65CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-203.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00472 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ownCloudOwnCloud8.1.8—No fix listedCNA
  • OwnCloud VendorownCloud Affected 8.1.8 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-25337
  2. 2026-10-03 Alias added: GHSA-v5m9-phxh-m6wj

References

Exploit 1

Other 2

  • TI-2023-26770 An issue was discovered in ownCloud owncloud/core before 10.13.1. KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-26768 An issue was discovered in ownCloud owncloud/graphapi 0.2.x before 0.2.1 and 0.3.x before… KEVCVSS 3.1CRITICAL 10.0
  • TI-2015-03941 Directory traversal vulnerability in the routing component in ownCloud Server before… CVSS 2.0HIGH 10.0
  • TI-2025-37176 ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the… CVSS 3.1MEDIUM 5.3
  • TI-2023-09745 ownCloud Android app vulnerable to SQL Injection CVSS 3.1MEDIUM 6.2
  • TI-2023-10305 ownCloud Android app vulnerable to Path Traversal CVSS 3.1MEDIUM 5.0
See all 172 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences