FKIE_CVE-2025-6069

Vulnerability from fkie_nvd - Published: 2025-06-17 14:15 - Updated: 2026-06-17 10:01
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Summary
The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
References
cna@python.orghttps://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949
cna@python.orghttps://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41
cna@python.orghttps://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49
cna@python.orghttps://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5
cna@python.orghttps://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b
cna@python.orghttps://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc
cna@python.orghttps://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15
cna@python.orghttps://github.com/python/cpython/issues/135462
cna@python.orghttps://github.com/python/cpython/pull/135464
cna@python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM/
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "html.parser"
          ],
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.10.19",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            },
            {
              "lessThan": "3.11.14",
              "status": "affected",
              "version": "3.11.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.12.12",
              "status": "affected",
              "version": "3.12.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.13.6",
              "status": "affected",
              "version": "3.13.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.14.0b3",
              "status": "affected",
              "version": "3.14.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "source": "cna@python.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service."
    },
    {
      "lang": "es",
      "value": "La clase html.parser.HTMLParser ten\u00eda una complejidad cuadr\u00e1tica en el peor de los casos al procesar ciertas entradas mal formadas que pod\u00edan llevar a una denegaci\u00f3n de servicio amplificada."
    }
  ],
  "id": "CVE-2025-6069",
  "lastModified": "2026-06-17T10:01:05.427",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "cna@python.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-6069",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-06-17T13:58:28.646020Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-06-17T14:15:33.677",
  "references": [
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/issues/135462"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/pull/135464"
    },
    {
      "source": "cna@python.org",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM/"
    }
  ],
  "sourceIdentifier": "cna@python.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ],
      "source": "cna@python.org",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.