Vulnerability-Lookup

CVE-2026-81890 (GCVE-0-2026-81890)

Vulnerability from cvelistv5 – Published: 2026-08-31 20:29 – Updated: 2026-09-01 13:55

Title

elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections

Summary

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, the netmount command is omitted from elFinderConnector::$csrfProtectedCmds in php/elFinderConnector.class.php, so validateCsrfToken() is not called for this state-changing operation. In the shipped php/connector.minimal.php-dist configuration, FTP network mounts are enabled by default, and attacker-controlled protocol, host, path, port, user, pass, alias, and options arguments flow through elFinder::netmount() in php/elFinder.class.php to php/elFinderVolumeFTP.class.php. A cross-site request can therefore persist an attacker-chosen FTP mount in the victim's session, cause the PHP server to connect to an attacker-chosen FTP host and port, and send supplied credentials without an X-elFinder-CSRF token. This issue is fixed in version 2.1.70.

Severity

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 13:54 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/Studio-42/elFinder/security/ad…	x_refsource_CONFIRM
https://github.com/Studio-42/elFinder/commit/3128…	x_refsource_MISC
https://github.com/Studio-42/elFinder/commit/36d4…	x_refsource_MISC
https://github.com/Studio-42/elFinder/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
Studio-42	elFinder	Affected: < 2.1.70	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-81890",
                "options": [
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T13:54:45.736717Z",
                "version": "2.0.3"
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        }
      ],
      "metrics": [
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      "references": [
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        {
          "name": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70",
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      "source": {
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      "title": "elFinder: CSRF in netmount allows forced FTP mounts and server-side FTP connections"
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    "dateReserved": "2026-08-27T17:48:42.123Z",
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  }
}

FKIE_CVE-2026-81890

Vulnerability from fkie_nvd - Published: 2026-08-31 21:17 - Updated: 2026-08-31 21:17

Severity

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762
	security-advisories@github.com	https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415
	security-advisories@github.com	https://github.com/Studio-42/elFinder/releases/tag/2.1.70
	security-advisories@github.com	https://github.com/Studio-42/elFinder/security/advisories/GHSA-9hjf-w35w-6vx2

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "elFinder",
          "vendor": "Studio-42",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.1.70"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, the netmount command is omitted from elFinderConnector::$csrfProtectedCmds in php/elFinderConnector.class.php, so validateCsrfToken() is not called for this state-changing operation. In the shipped php/connector.minimal.php-dist configuration, FTP network mounts are enabled by default, and attacker-controlled protocol, host, path, port, user, pass, alias, and options arguments flow through elFinder::netmount() in php/elFinder.class.php to php/elFinderVolumeFTP.class.php. A cross-site request can therefore persist an attacker-chosen FTP mount in the victim\u0027s session, cause the PHP server to connect to an attacker-chosen FTP host and port, and send supplied credentials without an X-elFinder-CSRF token. This issue is fixed in version 2.1.70."
    }
  ],
  "id": "CVE-2026-81890",
  "lastModified": "2026-08-31T21:17:52.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-31T21:17:52.603",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/commit/31284facd033e081b2b69c08873b39c8a413b762"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/commit/36d40fff12222ad4c229d8889d8ed3fd3dbf0415"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70"
    },
    {
      "source": "security-advisories@github.com",
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
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        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
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}

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.

Action not permitted

CVE-2026-81890 (GCVE-0-2026-81890)

FKIE_CVE-2026-81890

Tags

Sightings

Nomenclature