What’s Vulnerable › Vulnerabilities

CVE-2020-10252

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-19 · updated 2026-06-17
• Weakness: CWE-918

Description

An issue was discovered in ownCloud before 10.4. Because of an SSRF issue (via the apps/files_sharing/external remote parameter), an authenticated attacker can interact with local services blindly (aka Blind SSRF) or conduct a Denial Of Service attack.

Affected products

• Owncloud: before 10.4.0 — fixed in 10.4.0

How to fix

Upgrade to a fixed version: Owncloud 10.4.0. Check the vendor advisory for mitigations.

References

• https://blog.hacktivesecurity.com/index.php?controller=post&action=view&id_post=44
• https://owncloud.com/security-advisories/ssrf-in-add-to-your-owncloud-functionality/
• https://owncloud.org/changelog/server/
• https://blog.hacktivesecurity.com/index.php?controller=post&action=view&id_post=44
• https://owncloud.com/security-advisories/ssrf-in-add-to-your-owncloud-functionality/
• https://owncloud.org/changelog/server/

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