TI-2020-17373 Aliases CVE-2020-28645 GHSA-3f4c-grv3-wwg8

Deleting users with certain names caused system files to be deleted.

MEDIUM 42CWE-20Published 2021-02-09 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions < 10.6.

Why it matters now

EPSS 0.01255 69th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:owncloud:owncloud::::::::	before 10.6.0	Vulnerable	ownCloud

cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* Versions before 10.6.0 Vulnerable ·ownCloud

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2020-28645
2026-10-03 Alias added: GHSA-3f4c-grv3-wwg8

References

Advisory 1

https://owncloud.com/security-advisories/missing-user-validation-leading-to-information-disclosure/

TI-2015-03941 Directory traversal vulnerability in the routing component in ownCloud Server before… CVSS 2.0HIGH 10.0
TI-2014-01613 Zend Framework, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows… CVSS 3.1CRITICAL 9.8
TI-2014-01609 The user_openid app in ownCloud Server before 5.0.15 allows remote attackers to obtain… CVSS 3.0CRITICAL 9.8
TI-2014-01605 Incomplete blacklist vulnerability in ajax/upload.php in ownCloud before 5.0, when… CVSS 2.0HIGH 7.5
TI-2021-14401 A receiver of a federated share with access to the database with ownCloud version before… CVSS 3.1CRITICAL 9.8
TI-2015-06395 icewind1991 SMB before 1.0.3 allows remote authenticated users to execute arbitrary SMB… CVSS 2.0HIGH 9.0

See all 115 →

Sources

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