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CVE-2026-33679

Estado: AnalizadaAlta (7.4)—

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `picture` claim URL. An attacker who controls their OIDC profile picture URL can force the Vikunja server to make HTTP GET requests to arbitrary internal or cloud metadata endpoints. This bypasses the SSRF protections that are correctly applied to the webhook system. Version 2.2.1 patches the issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad SSRF en descarga de imágenes de avatar desde claims OIDC (CWE-918) sin protecciones, requiere autenticación (PR:L) en red remota. Permite proxy/SSRF (T1090) e ingreso a metadatos en la nube (T1552).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementFilter Network TrafficUpdate SoftwareActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

Vikunja — Vikunja

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-33679",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33679",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-24T17:33:25.887211Z"
        }
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
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      },
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      "tags": [
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        "Vendor Advisory"
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      "source": "security-advisories@github.com"
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    {
      "url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released",
      "tags": [
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      "source": "security-advisories@github.com"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
        {
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          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `picture` claim URL. An attacker who controls their OIDC profile picture URL can force the Vikunja server to make HTTP GET requests to arbitrary internal or cloud metadata endpoints. This bypasses the SSRF protections that are correctly applied to the webhook system. Version 2.2.1 patches the issue."
    },
    {
      "lang": "es",
      "value": "Vikunja es una plataforma de gestión de tareas de código abierto autoalojada. Antes de la versión 2.2.1, la función `DownloadImage` en `pkg/utils/avatar.go` utiliza un `http.Client{}` básico sin protección SSRF al descargar imágenes de avatar de usuario de la URL de la declaración 'picture' de OpenID Connect. Un atacante que controla la URL de la imagen de perfil de su OIDC puede forzar al servidor Vikunja a realizar solicitudes GET HTTP a puntos finales de metadatos internos o en la nube arbitrarios. Esto elude las protecciones SSRF que se aplican correctamente al sistema de webhooks. La versión 2.2.1 corrige el problema."
    }
  ],
  "lastModified": "2026-06-17T10:37:54.877",
  "configurations": [
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