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CVE-2022-28281

Status: ModifiedHigh (8.8)—💥 PoC

If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

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 (3)

Mozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2022-28281",
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  "metrics": {
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    },
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      "lang": "es",
      "value": "Si un proceso de contenido comprometido envió una cantidad inesperada de extensiones WebAuthN en un comando de registro al proceso principal, se habría producido una escritura fuera de los límites que provocaría daños en la memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Thunderbird &lt; 91.8, Firefox &lt; 99 y Firefox ESR &lt; 91.8."
    }
  ],
  "lastModified": "2026-06-17T04:38:19.400",
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