Vulnerability-Lookup

CVE-2026-84282 (GCVE-0-2026-84282)

Vulnerability from cvelistv5 – Published: 2026-09-08 14:27 – Updated: 2026-09-10 17:58

Title

A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin (version 9.12)

Summary

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

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-10 17:58 UTC

CWE

Assigner

certcc mitre root

References

3 references

URL	Tags
https://github.com/ONLYOFFICE/onlyoffice-owncloud…
https://kb.cert.org/vuls/id/943094
https://www.kb.cert.org/vuls/id/943094

Impacted products

1 product

Vendor	Product	Version	CPE status
Ascensio System SIA / OnlyOffice	ONLYOFFICE ownCloud integration plugin	Affected: 9.12	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84282

Vulnerability from fkie_nvd - Published: 2026-09-08 15:18 - Updated: 2026-09-10 18:18

Severity

6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	cret@cert.org	https://github.com/ONLYOFFICE/onlyoffice-owncloud/blob/master/controller/settingsapicontroller.php
	cret@cert.org	https://kb.cert.org/vuls/id/943094
	af854a3a-2127-422b-91ae-364da2661108	https://www.kb.cert.org/vuls/id/943094

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ONLYOFFICE ownCloud integration plugin",
          "vendor": "Ascensio System SIA / OnlyOffice",
          "versions": [
            {
              "status": "affected",
              "version": "9.12"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-84282",
  "lastModified": "2026-09-10T18:18:09.300",
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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  "published": "2026-09-08T15:18:51.473",
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    {
      "source": "cret@cert.org",
      "url": "https://github.com/ONLYOFFICE/onlyoffice-owncloud/blob/master/controller/settingsapicontroller.php"
    },
    {
      "source": "cret@cert.org",
      "url": "https://kb.cert.org/vuls/id/943094"
    },
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  "sourceIdentifier": "cret@cert.org",
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}

GHSA-WPFP-J2F8-C6VJ

Vulnerability from github – Published: 2026-09-08 15:31 – Updated: 2026-09-10 18:31

Details

Severity

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-84282"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-08T15:18:51Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-wpfp-j2f8-c6vj",
  "modified": "2026-09-10T18:31:31Z",
  "published": "2026-09-08T15:31:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84282"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ONLYOFFICE/onlyoffice-owncloud/blob/master/controller/settingsapicontroller.php"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/943094"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/943094"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-84282 (GCVE-0-2026-84282)

FKIE_CVE-2026-84282

GHSA-WPFP-J2F8-C6VJ

Tags

Sightings

Nomenclature

Related by attack behaviour