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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2020-10870

Zim through 0.72.1 creates temporary directories with predictable names. A malicious user could predict and create Zim's temporary directories and prevent other users from being able to start Zim, resulting in a denial of service.

Products
Not specified
Affected versions
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Fixed versions
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CVEs
CVE-2020-10870
Confirmed fixed CVEs
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Updated in this feed
31 Oct 2026, 10:49 UTC · Revision 1

Source evidence

CVE-2020-10870

core-osv · Original source

Published 23 Mar 2020, 20:15 UTC

Zim through 0.72.1 creates temporary directories with predictable names. A malicious user could predict and create Zim's temporary directories and prevent other users from being able to start Zim, resulting in a denial of service.

osv:CVE-2020-10870
Complete source record
{
  "id": "50e5476ad23bead8fc885fedfba553df97b0a6a6ca3a8162ac5c3e6bbcb8f355",
  "url": "https://osv.dev/vulnerability/CVE-2020-10870",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-10870",
    "summary": "Zim through 0.72.1 creates temporary directories with predictable names. A malicious user could predict and create Zim's temporary directories and prevent other users from being able to start Zim, resulting in a denial of service.",
    "evidence": "osv:CVE-2020-10870",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-10870",
      "aliases": [
        "CVE-2020-10870"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zim-desktop-wiki/zim-desktop-wiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "8ddfb34dceeb5dc1ee09b823c3afe5fabfcaa897"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zim-wiki:zim:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.72.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.72.1",
            "0.72.0",
            "0.71.1",
            "0.71.0",
            "0.70",
            "0.70-rc3",
            "0.69",
            "0.70-rc2",
            "0.70-rc1",
            "0.68",
            "0.68-rc1",
            "0.67",
            "0.67-rc2",
            "0.67-rc1",
            "0.66",
            "0.65",
            "0.64",
            "0.63",
            "0.62",
            "0.61",
            "0.60",
            "0.59",
            "0.58",
            "0.57",
            "0.56",
            "0.55",
            "0.54",
            "0.53",
            "0.52",
            "0.51",
            "0.50",
            "0.49",
            "0.48",
            "0.47",
            "0.46",
            "0.45",
            "0.44",
            "0.43",
            "0.42",
            "0.42-beta3",
            "0.42-beta2",
            "0.42-beta1",
            "0.42-alpha2",
            "0.42-alpha1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-10870.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:46.355006297Z",
      "provider": "osv",
      "references": [
        "https://github.com/zim-desktop-wiki/zim-desktop-wiki/issues/1028"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-10870",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382920,
  "published_at": "2020-03-23T20:15:11.807+00:00"
}