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CVE-2022-22760

Status: ModifiedMedium (6.5)—

When importing resources using Web Workers, error messages would distinguish the difference between <code>application/javascript</code> responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

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 (3)

Mozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2022-22760",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-22760",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-16T14:35:05.905570Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Secondary",
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        "cvssData": {
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "97",
              "versionType": "custom"
            }
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        },
        {
          "vendor": "Mozilla",
          "product": "Thunderbird",
          "versions": [
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              "status": "affected",
              "version": "unspecified",
              "lessThan": "91.6",
              "versionType": "custom"
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        },
        {
          "vendor": "Mozilla",
          "product": "Firefox ESR",
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              "version": "unspecified",
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              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-12-22T20:15:19.773",
  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1740985",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
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      "source": "security@mozilla.org"
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      "tags": [
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      "tags": [
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      "source": "security@mozilla.org"
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      "url": "https://www.mozilla.org/security/advisories/mfsa2022-06/",
      "tags": [
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      "source": "security@mozilla.org"
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    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1740985",
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      "tags": [
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    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2022-06/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-209"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-209"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When importing resources using Web Workers, error messages would distinguish the difference between <code>application/javascript</code> responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6."
    },
    {
      "lang": "es",
      "value": "Al importar recursos utilizando Web Workers, los mensajes de error distinguirían la diferencia entre respuestas <code>application/javascript</code> y respuestas sin script. Se podría haber abusado de esto para aprender información de origen cruzado. Esta vulnerabilidad afecta a Firefox &lt; 97, Thunderbird &lt; 91.6 y Firefox ESR &lt; 91.6."
    }
  ],
  "lastModified": "2026-06-17T04:28:59.080",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "97.0"
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  "sourceIdentifier": "security@mozilla.org"
}