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CVE-2026-34213

Status: AnalyzedMedium (5.4)—

Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Docmost — Docmost

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-34213",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34213",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-15T13:31:11.461730Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "docmost",
          "product": "docmost",
          "versions": [
            {
              "status": "affected",
              "version": ">= 0.3.0, < 0.71.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-04-14T22:16:31.193",
  "references": [
    {
      "url": "https://github.com/docmost/docmost/security/advisories/GHSA-89fp-2hch-j9gp",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch."
    },
    {
      "lang": "es",
      "value": "Docmost es un software de wiki y documentación colaborativo de código abierto. A partir de la versión 0.3.0 y antes de la versión 0.71.0, una autorización indebida en Docmost permite a un usuario autenticado con bajos privilegios sobrescribir el adjunto de otra página dentro del mismo espacio de trabajo proporcionando un 'attachmentId' de la víctima a 'POST /API/files/upload'. Este es un problema de integridad remota que no requiere interacción de la víctima. La versión 0.71.0 contiene un parche."
    }
  ],
  "lastModified": "2026-07-24T22:10:00.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3DBD5227-C9AE-4A0D-9607-E7238FA6D754",
              "versionEndExcluding": "0.71.0",
              "versionStartIncluding": "0.3.0"
            }
          ],
          "operator": "OR"
        }
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}