CVE-2020-28644

Severity: medium (CVSS 4.3 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: 2021-02-09 · updated 2026-06-17
Weakness: CWE-352

Description

The CSRF (Cross Site Request Forgery) token check was improperly implemented on cookie authenticated requests against some ocs API endpoints. This affects ownCloud/core version < 10.6.

Affected products

Owncloud: before 10.6.0 — fixed in 10.6.0

How to fix

Upgrade to a fixed version: Owncloud 10.6.0. Check the vendor advisory for mitigations.

References

https://owncloud.com/security-advisories/cross-site-request-forgery-in-the-ocs-api/
https://owncloud.com/security-advisories/cross-site-request-forgery-in-the-ocs-api/

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