fkie_cve-2025-48940
Vulnerability from fkie_nvd
Published
2025-06-02 16:15
Modified
2025-07-02 15:18
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
MyBB is free and open source forum software. Prior to version 1.8.39, the upgrade component does not validate user input properly, which allows attackers to perform local file inclusion (LFI) via a specially crafted parameter value. In order to exploit the vulnerability, the installer must be unlocked (no `install/lock` file present) and the upgrade script must be accessible (by re-installing the forum via access to `install/index.php`; when the forum has not yet been installed; or the attacker is authenticated as a forum administrator). MyBB 1.8.39 resolves this issue.
References
security-advisories@github.comhttps://github.com/mybb/mybb/commit/6e6cfbd524d9101b51e1278ecf520479b64b0f00Patch
security-advisories@github.comhttps://github.com/mybb/mybb/security/advisories/GHSA-q4jv-xwjx-37cpVendor Advisory
security-advisories@github.comhttps://mybb.com/versions/1.8.39Product, Release Notes
Impacted products
Vendor Product Version
mybb mybb *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C6445406-D542-43F3-97A5-BB4BDC20E2FA",
              "versionEndExcluding": "1.8.39",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MyBB is free and open source forum software. Prior to version 1.8.39, the upgrade component does not validate user input properly, which allows attackers to perform local file inclusion (LFI) via a specially crafted parameter value. In order to exploit the vulnerability, the installer must be unlocked (no `install/lock` file present) and the upgrade script must be accessible (by re-installing the forum via access to `install/index.php`; when the forum has not yet been installed; or the attacker is authenticated as a forum administrator). MyBB 1.8.39 resolves this issue."
    },
    {
      "lang": "es",
      "value": "MyBB es un software de foro gratuito y de c\u00f3digo abierto. Antes de la versi\u00f3n 1.8.39, el componente de actualizaci\u00f3n no validaba correctamente la entrada del usuario, lo que permit\u00eda a los atacantes realizar la inclusi\u00f3n local de archivos (LFI) mediante un valor de par\u00e1metro especialmente manipulado. Para explotar esta vulnerabilidad, el instalador debe estar desbloqueado (sin el archivo `install/lock` presente) y el script de actualizaci\u00f3n debe ser accesible (reinstalando el foro mediante el acceso a `install/index.php`; cuando el foro a\u00fan no se haya instalado; o el atacante est\u00e9 autenticado como administrador del foro). MyBB 1.8.39 resuelve este problema."
    }
  ],
  "id": "CVE-2025-48940",
  "lastModified": "2025-07-02T15:18:47.520",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-06-02T16:15:30.063",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/mybb/mybb/commit/6e6cfbd524d9101b51e1278ecf520479b64b0f00"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/mybb/mybb/security/advisories/GHSA-q4jv-xwjx-37cp"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://mybb.com/versions/1.8.39"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.