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CVE-2024-35333

Status: DeferredHigh (8.4)—💥 PoC

A stack-buffer-overflow vulnerability exists in the read_charset_decl function of html2xhtml 1.3. This vulnerability occurs due to improper bounds checking when copying data into a fixed-size stack buffer. An attacker can exploit this vulnerability by providing a specially crafted input to the vulnerable function, causing a buffer overflow and potentially leading to arbitrary code execution, denial of service, or data corruption.

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)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Html2xhtml — Html2xhtmlAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2024-35333",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-35333",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-08-19T15:27:16.755948Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.4,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:html2xhtml_project:html2xhtml:*:*:*:*:*:*:*:*"
          ],
          "vendor": "html2xhtml_project",
          "product": "html2xhtml",
          "versions": [
            {
              "status": "affected",
              "version": "1.3"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-05-29T16:15:11.000",
  "references": [
    {
      "url": "https://github.com/momo1239/CVE-2024-35333",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/momo1239/CVE-2024-35333",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack-buffer-overflow vulnerability exists in the read_charset_decl function of html2xhtml 1.3. This vulnerability occurs due to improper bounds checking when copying data into a fixed-size stack buffer. An attacker can exploit this vulnerability by providing a specially crafted input to the vulnerable function, causing a buffer overflow and potentially leading to arbitrary code execution, denial of service, or data corruption."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de desbordamiento del búfer de pila en la función read_charset_decl de html2xhtml 1.3. Esta vulnerabilidad se produce debido a una comprobación de los límites inadecuada al copiar datos en un búfer de pila de tamaño fijo. Un atacante puede aprovechar esta vulnerabilidad proporcionando una entrada especialmente manipulada para la función vulnerable, lo que provoca un desbordamiento del búfer y potencialmente conduce a la ejecución de código arbitrario, denegación de servicio o corrupción de datos."
    }
  ],
  "lastModified": "2026-06-17T07:34:45.480",
  "sourceIdentifier": "cve@mitre.org"
}