OwnCloud 8.1.8 - Username Disclosure
Published Feb 12, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.42%
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
-
- Version 8.1.8StatusaffectedConstraints-
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS: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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Feb 13, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Feb–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00422) | 34.20th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.41% (0.00406) | 32.12th | v5 (v2026.06.15) |
| Feb 13, 2026 | 0.11% (0.00112) | 29.95th | v4 (v2025.03.14) |
References (4)
- https://ftp.icm.edu.pl/packages/owncloud/ product
- https://owncloud.org/ product
- https://www.exploit-db.com/exploits/47745 exploit
- https://www.vulncheck.com/advisories/owncloud-username-disclosure third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://ftp.icm.edu.pl/packages/owncloud/ | product | |
| https://owncloud.org/ | product | |
| https://www.exploit-db.com/exploits/47745 | exploit | |
| https://www.vulncheck.com/advisories/owncloud-username-disclosure | third-party-advisory |
Change history (0)
No recorded changes yet.