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CVE-2021-21380

Status: ModifiedHigh (8.8)—💥 PoC

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions of XWiki Platform (and only those with the Ratings API installed), the Rating Script Service expose an API to perform SQL requests without escaping the from and where search arguments. This might lead to an SQL script injection quite easily for any user having Script rights on XWiki. The problem has been patched in XWiki 12.9RC1. The only workaround besides upgrading XWiki would be to uninstall the Ratings API in XWiki from the Extension Manager.

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Xwiki — Xwiki

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-21380",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
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  "affected": [
    {
      "source": "security-advisories@github.com",
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          "product": "xwiki-platform",
          "versions": [
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              "status": "affected",
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            }
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  "published": "2021-03-23T23:15:13.630",
  "references": [
    {
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-79rg-7mv3-jrr5",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
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      "url": "https://jira.xwiki.org/browse/XWIKI-17662",
      "tags": [
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        "Vendor Advisory"
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    },
    {
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-79rg-7mv3-jrr5",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions of XWiki Platform (and only those with the Ratings API installed), the Rating Script Service expose an API to perform SQL requests without escaping the from and where search arguments. This might lead to an SQL script injection quite easily for any user having Script rights on XWiki. The problem has been patched in XWiki 12.9RC1. The only workaround besides upgrading XWiki would be to uninstall the Ratings API in XWiki from the Extension Manager."
    },
    {
      "lang": "es",
      "value": "XWiki Platform es una plataforma wiki genérica que ofrece servicios en tiempo de ejecución para aplicaciones creadas sobre ella.&#xa0;En las versiones afectadas de la plataforma XWiki (y solo aquellas con la API Ratings instalada), el Rating Script Service expone una API para llevar a cabo peticiones SQL sin escapar de los argumentos de búsqueda desde y dónde.&#xa0;Esto podría conllevar a una inyección de Script SQL con bastante facilidad para cualquier usuario que tenga derechos de Script en XWiki.&#xa0;El problema ha sido parcheado en XWiki versión 12.9RC1.&#xa0;La única solución alternativa además de actualizar XWiki sería desinstalar la API Ratings en XWiki desde el Extension Manager"
    }
  ],
  "lastModified": "2026-06-17T03:35:26.977",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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              "vulnerable": true,
              "matchCriteriaId": "8ED2FCAC-A009-4684-B9D0-F09DE16AD91D",
              "versionEndIncluding": "12.8",
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            },
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}