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    2 vulnerabilities found for Files Lock by Nextcloud

    CVE-2026-82980 (GCVE-0-2026-82980)

    Vulnerability from nvd – Published: 2026-09-18 01:26 – Updated: 2026-09-18 01:26
    VLAI
    Summary
    Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables: Cross-user manual locks : attacker locks a victim's files, blocking writes (PUT/MOVE/DELETE, editor saves). Lock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    CWE
    • CWE-287 - Improper Authentication - Generic
    Assigner
    References
    Impacted products
    Vendor Product Version
    Nextcloud Files Lock Affected: 31.0.0 , ≤ 33.0.0 (semver)
    		Create a notification for this product.
    Credits
    Balvant Chavda (0x0doteth)
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Files Lock",
          "vendor": "Nextcloud",
          "versions": [
            {
              "lessThanOrEqual": "33.0.0",
              "status": "affected",
              "version": "31.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Balvant Chavda (0x0doteth)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables:\n\nCross-user manual locks : attacker locks a victim\u0027s files, blocking writes (PUT/MOVE/DELETE, editor saves).\nLock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287 Improper Authentication - Generic",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T01:26:04.588Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://hackerone.com/reports/3301553"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-82980",
    "datePublished": "2026-09-18T01:26:04.588Z",
    "dateReserved": "2026-08-31T15:00:00.543Z",
    "dateUpdated": "2026-09-18T01:26:04.588Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-82980 (GCVE-0-2026-82980)

    Vulnerability from cvelistv5 – Published: 2026-09-18 01:26 – Updated: 2026-09-18 01:26
    VLAI
    Summary
    Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables: Cross-user manual locks : attacker locks a victim's files, blocking writes (PUT/MOVE/DELETE, editor saves). Lock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    CWE
    • CWE-287 - Improper Authentication - Generic
    Assigner
    References
    Impacted products
    Vendor Product Version
    Nextcloud Files Lock Affected: 31.0.0 , ≤ 33.0.0 (semver)
    		Create a notification for this product.
    Credits
    Balvant Chavda (0x0doteth)
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Files Lock",
          "vendor": "Nextcloud",
          "versions": [
            {
              "lessThanOrEqual": "33.0.0",
              "status": "affected",
              "version": "31.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Balvant Chavda (0x0doteth)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables:\n\nCross-user manual locks : attacker locks a victim\u0027s files, blocking writes (PUT/MOVE/DELETE, editor saves).\nLock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287 Improper Authentication - Generic",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T01:26:04.588Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://hackerone.com/reports/3301553"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-82980",
    "datePublished": "2026-09-18T01:26:04.588Z",
    "dateReserved": "2026-08-31T15:00:00.543Z",
    "dateUpdated": "2026-09-18T01:26:04.588Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}