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CVE-2021-43841

Status: ModifiedMedium (5.4)—

XWiki is a generic wiki platform offering runtime services for applications built on top of it. When using default XWiki configuration, it's possible for an attacker to upload an SVG containing a script executed when executing the download action on the file. This problem has been patched so that the default configuration doesn't allow to display the SVG files in the browser. Users are advised to update or to disallow uploads of SVG files.

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)

Xwiki — Xwiki

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-43841",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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              "automatable": "no"
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            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2025-04-22T15:51:33.073514Z"
        }
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    "cvssMetricV2": [
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          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
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        "userInteractionRequired": true
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    "cvssMetricV31": [
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        "type": "Secondary",
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  "affected": [
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    {
      "url": "https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/Attachments#HAttachmentdisplayordownload",
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      "description": [
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      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "XWiki is a generic wiki platform offering runtime services for applications built on top of it. When using default XWiki configuration, it's possible for an attacker to upload an SVG containing a script executed when executing the download action on the file. This problem has been patched so that the default configuration doesn't allow to display the SVG files in the browser. Users are advised to update or to disallow uploads of SVG files."
    },
    {
      "lang": "es",
      "value": "XWiki es una plataforma wiki genérica que ofrece servicios de tiempo de ejecución para aplicaciones construidas sobre ella. Cuando es usada la configuración predeterminada de XWiki, es posible que un atacante cargue un SVG que contenga un script ejecutado cuando es ejecutada la acción de descarga en el archivo. Este problema ha sido parcheado para que la configuración por defecto no permita mostrar los archivos SVG en el navegador. Se aconseja a usuarios que actualicen o desestimen la carga de archivos SVG"
    }
  ],
  "lastModified": "2026-06-17T04:11:33.017",
  "configurations": [
    {
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        {
          "negate": false,
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}