CVE-2026-115932

Full vulnerability record from the local CVENow database.

Description

When a post is published, Postiz treats a media path that is not a web address as a file on the server's disk, but it does not check that the file lies inside the upload directory. A registered user can store a crafted media path with a post, get it past the checks that normally restrict it, and have the publishing worker read an arbitrary file and send it as an attachment to a Discord server the user controls. The same unconfined reads can be reached through two further routes. One tells the caller whether a file exists and can exhaust the backend's memory, the other delivers the file the same way as the main route. Self-registration is open by default, so the attacker needs no existing account.

Severity

CRITICAL

CVSS score

9.6 (v3.1)

Vulnerability status

Deferred

Source identifier

4cdc9741-f887-419a-a2fd-acbbd2729276

Published

2026-10-24 13:16:37.217000

Last modified

2026-10-26 16:54:34.940000

View original CVE JSON

{
  "id": "CVE-2026-115932",
  "sourceIdentifier": "4cdc9741-f887-419a-a2fd-acbbd2729276",
  "published": "2026-10-24T13:16:37.217",
  "lastModified": "2026-10-26T16:54:34.940",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When a post is published, Postiz treats a media path that is not a web address as a file on the server's disk, but it does not check that the file lies inside the upload directory. A registered user can store a crafted media path with a post, get it past the checks that normally restrict it, and have the publishing worker read an arbitrary file and send it as an attachment to a Discord server the user controls.\n\nThe same unconfined reads can be reached through two further routes. One tells the caller whether a file exists and can exhaust the backend's memory, the other delivers the file the same way as the main route. Self-registration is open by default, so the attacker needs no existing account."
    }
  ],
  "affected": [
    {
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "affectedData": [
        {
          "vendor": "GitroomHQ",
          "product": "postiz-app",
          "defaultStatus": "unaffected",
          "packageName": "postiz-app",
          "repo": "https://github.com/gitroomhq/postiz-app",
          "versions": [
            {
              "version": "2.23.0",
              "lessThan": "2.25.3",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8
      }
    ]
  },
  "weaknesses": [
    {
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gadvisory.org/advisories/PSA-2026-E9AHFV",
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276"
    },
    {
      "url": "https://github.com/gitroomhq/postiz-app",
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276"
    },
    {
      "url": "https://github.com/gitroomhq/postiz-app/commit/12db9bd2f428b628a62809669c3d76297e07750a",
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276"
    },
    {
      "url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.3",
      "source": "4cdc9741-f887-419a-a2fd-acbbd2729276"
    }
  ]
}