CVE-2026-84282

6.5 mediumEPSS 0.3%

Medium (6.5). EPSS 0.3% chance of exploitation in the next 30 days.

A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin version 9.12. The /apps/onlyoffice/ajax/settings/address endpoint does not sufficiently validate the user-supplied Document Server URL before initiating outbound connections. An authenticated administrator can manipulate the document server parameter to cause the ownCloud server to send arbitrary requests to attacker-controlled destinations, including localhost and internal network hosts. This allows internal network reconnaissance and TCP port scanning based on differences in server responses.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
Published: 2026-09-08
Modified: 2026-09-10
Record from: the NVD, synced 2026-10-19

References

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