CVE-2020-10252Network attack vector

Blind internal requests via unvalidated federated URLs

Published Feb 19, 2021 · Updated Aug 4, 2024

SSRF in ownCloud Server 10.3 and 10.3.1 allows remote authenticated users to make the server issue GET requests to crafted URLs. The apps/files_sharing/external endpoint accepts the remote parameter as a federated URL without sufficient validation and sends a request to that address. Exploitation requires a received public link-share URL; responses remain hidden, so the bounded effect is blind interaction with internal or external services.

CVSS severity1.3
Low
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in ownCloud Server 10.3 and 10.3.1 allows remote authenticated users to make the server issue GET requests to crafted URLs. The apps/files_sharing/external endpoint accepts the remote parameter as a federated URL without sufficient validation and sends a request to that address. Exploitation requires a received public link-share URL; responses remain hidden, so the bounded effect is blind interaction with internal or external services.

The record

CVE
CVE-2020-10252
Published
Feb 19, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, CWE-20, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
1.3ownCloudCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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