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CVE-2015-8710

Status: ModifiedCritical (9.8)—

The htmlParseComment function in HTMLparser.c in libxml2 allows attackers to obtain sensitive information, cause a denial of service (out-of-bounds heap memory access and application crash), or possibly have unspecified other impact via an unclosed HTML comment.

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 (2)

Debian — Debian LinuxXmlsoft — Libxml2

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2015-8710",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/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": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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  ],
  "published": "2016-04-11T21:59:15.667",
  "references": [
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1089.html",
      "tags": [
        "Third Party Advisory"
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    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3430",
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      "source": "security@debian.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2015/04/19/4",
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        "Patch"
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      "source": "security@debian.org"
    },
    {
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    {
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    {
      "url": "http://www.securityfocus.com/bid/79811",
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      "source": "security@debian.org"
    },
    {
      "url": "https://bugzilla.gnome.org/show_bug.cgi?id=746048",
      "tags": [
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      "source": "security@debian.org"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=e724879d964d774df9b7969fc846605aa1bac54c",
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      "url": "http://rhn.redhat.com/errata/RHSA-2016-1089.html",
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    {
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      "tags": [
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.gnome.org/show_bug.cgi?id=746048",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=e724879d964d774df9b7969fc846605aa1bac54c",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://hackerone.com/reports/57125#activity-384861",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The htmlParseComment function in HTMLparser.c in libxml2 allows attackers to obtain sensitive information, cause a denial of service (out-of-bounds heap memory access and application crash), or possibly have unspecified other impact via an unclosed HTML comment."
    },
    {
      "lang": "es",
      "value": "La función htmlParseComment en HTMLparser.c en libxml2 permite a atacantes obtener información sensible, provocar una denegación de servicio (acceso a memoria dinámica fuera de límites y caída de aplicación), o posiblemente tener otro impacto no especificado a través de un comentario HTML no cerrado."
    }
  ],
  "lastModified": "2026-06-17T00:35:04.680",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "070C5B7B-0A5E-4B15-98A9-4ADCC694E7FA",
              "versionEndExcluding": "2.9.3"
            }
          ],
          "operator": "OR"
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    },
    {
      "nodes": [
        {
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              "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@debian.org"
}