FKIE_CVE-2026-33482

Vulnerability from fkie_nvd - Published: 2026-03-23 15:16 - Updated: 2026-03-24 18:41
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `sanitizeFFmpegCommand()` function in `plugin/API/standAlone/functions.php` is designed to prevent OS command injection in ffmpeg commands by stripping dangerous shell metacharacters (`&&`, `;`, `|`, `` ` ``, `<`, `>`). However, it fails to strip `$()` (bash command substitution syntax). Since the sanitized command is executed inside a double-quoted `sh -c` context in `execAsync()`, an attacker who can craft a valid encrypted payload can achieve arbitrary command execution on the standalone encoder server. Commit 25c8ab90269e3a01fb4cf205b40a373487f022e1 contains a patch.
References
security-advisories@github.comhttps://github.com/WWBN/AVideo/commit/25c8ab90269e3a01fb4cf205b40a373487f022e1Patch
security-advisories@github.comhttps://github.com/WWBN/AVideo/security/advisories/GHSA-pmj8-r2j7-xg6cExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
wwbn avideo *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "774C24F1-9D26-484F-B931-1DA107C8F588",
              "versionEndIncluding": "26.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `sanitizeFFmpegCommand()` function in `plugin/API/standAlone/functions.php` is designed to prevent OS command injection in ffmpeg commands by stripping dangerous shell metacharacters (`\u0026\u0026`, `;`, `|`, `` ` ``, `\u003c`, `\u003e`). However, it fails to strip `$()` (bash command substitution syntax). Since the sanitized command is executed inside a double-quoted `sh -c` context in `execAsync()`, an attacker who can craft a valid encrypted payload can achieve arbitrary command execution on the standalone encoder server. Commit 25c8ab90269e3a01fb4cf205b40a373487f022e1 contains a patch."
    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones hasta la 26.0 inclusive, la funci\u00f3n \u0027sanitizeFFmpegCommand()\u0027 en \u0027plugin/API/standAlone/functions.php\u0027 est\u00e1 dise\u00f1ada para prevenir la inyecci\u00f3n de comandos del sistema operativo en comandos ffmpeg eliminando metacaracteres peligrosos del shell (\u0027\u0026amp;\u0026amp;\u0027, \u0027;\u0027, \u0027|\u0027, \u0027`\u0027, \u0027\u0026lt;\u0027, \u0027\u0026gt;\u0027). Sin embargo, no logra eliminar \u0027$()\u0027 (sintaxis de sustituci\u00f3n de comandos de bash). Dado que el comando saneado se ejecuta dentro de un contexto \u0027sh -c\u0027 entre comillas dobles en \u0027execAsync()\u0027, un atacante que puede crear una carga \u00fatil cifrada v\u00e1lida puede lograr la ejecuci\u00f3n arbitraria de comandos en el servidor codificador independiente. El commit 25c8ab90269e3a01fb4cf205b40a373487f022e1 contiene un parche."
    }
  ],
  "id": "CVE-2026-33482",
  "lastModified": "2026-03-24T18:41:00.410",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-23T15:16:34.560",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/WWBN/AVideo/commit/25c8ab90269e3a01fb4cf205b40a373487f022e1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-pmj8-r2j7-xg6c"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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