CVE-2025-6491 (GCVE-0-2025-6491)

Vulnerability from cvelistv5 – Published: 2025-07-13 22:10 – Updated: 2025-11-04 21:14
VLAI
Title
NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
Summary
In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
php
References
Impacted products
Vendor Product Version
PHP Group PHP Affected: 8.1.* , < 8.1.33 (semver)
Affected: 8.2.* , < 8.2.29 (semver)
Affected: 8.3.* , < 8.3.23 (semver)
Affected: 8.4.* , < 8.4.10 (semver)
Create a notification for this product.
Date Public
2025-07-03 12:27
Credits
Ahmed Lekssays
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-6491",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-14T15:59:51.249317Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-14T15:59:53.756Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T21:14:48.898Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/11/4"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "packageName": "soap",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.1.33",
              "status": "affected",
              "version": "8.1.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.2.29",
              "status": "affected",
              "version": "8.2.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.3.23",
              "status": "affected",
              "version": "8.3.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.4.10",
              "status": "affected",
              "version": "8.4.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Ahmed Lekssays"
        }
      ],
      "datePublic": "2025-07-03T12:27:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eIn PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (\u0026gt;2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.\u0026nbsp;\u003c/p\u003e"
            }
          ],
          "value": "In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (\u003e2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476 NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-13T22:10:15.996Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
        {
          "url": "https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x"
        }
      ],
      "source": {
        "advisory": "GHSA-453j-q27h-5p8x",
        "discovery": "EXTERNAL"
      },
      "title": "NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
    "assignerShortName": "php",
    "cveId": "CVE-2025-6491",
    "datePublished": "2025-07-13T22:10:15.996Z",
    "dateReserved": "2025-06-22T03:05:22.008Z",
    "dateUpdated": "2025-11-04T21:14:48.898Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-6491",
      "date": "2026-05-29",
      "epss": "0.00772",
      "percentile": "0.73873"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-6491\",\"sourceIdentifier\":\"security@php.net\",\"published\":\"2025-07-13T22:15:23.353\",\"lastModified\":\"2025-11-04T22:16:43.147\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (\u003e2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.\"},{\"lang\":\"es\",\"value\":\"En las versiones de PHP 8.1.* anteriores a la 8.1.33, 8.2.* anteriores a la 8.2.29, 8.3.* anteriores a la 8.3.23 y 8.4.* anteriores a la 8.4.10, al analizar datos XML en extensiones SOAP, un prefijo de espacio de nombres XML demasiado grande (\u0026gt;2 GB) puede provocar la desreferencia de puntero nulo. Esto puede provocar fallos y afectar la disponibilidad del servidor de destino.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@php.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security@php.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.1.0\",\"versionEndExcluding\":\"8.1.33\",\"matchCriteriaId\":\"1DFFB7CE-0CB6-4229-8A83-D5994163F599\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.2.0\",\"versionEndExcluding\":\"8.2.29\",\"matchCriteriaId\":\"C0671DC7-C9E0-4CB9-8CBE-7C7D724A4E3F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.3.0\",\"versionEndExcluding\":\"8.3.23\",\"matchCriteriaId\":\"99142A2A-C510-477B-A090-DE73441BBFD0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.4.0\",\"versionEndExcluding\":\"8.4.10\",\"matchCriteriaId\":\"61D8A8DF-85D3-435B-BB2B-F3D728575758\"}]}]}],\"references\":[{\"url\":\"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x\",\"source\":\"security@php.net\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2025/07/11/4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2025/07/11/4\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T21:14:48.898Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-6491\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-07-14T15:59:51.249317Z\"}}}], \"references\": [{\"url\": \"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-07-14T15:59:46.081Z\"}}], \"cna\": {\"title\": \"NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix\", \"source\": {\"advisory\": \"GHSA-453j-q27h-5p8x\", \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Ahmed Lekssays\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"PHP Group\", \"product\": \"PHP\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.1.*\", \"lessThan\": \"8.1.33\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"8.2.*\", \"lessThan\": \"8.2.29\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"8.3.*\", \"lessThan\": \"8.3.23\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"8.4.*\", \"lessThan\": \"8.4.10\", \"versionType\": \"semver\"}], \"packageName\": \"soap\", \"defaultStatus\": \"affected\"}], \"datePublic\": \"2025-07-03T12:27:00.000Z\", \"references\": [{\"url\": \"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (\u003e2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIn PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (\u0026gt;2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.\u0026nbsp;\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"dd77f84a-d19a-4638-8c3d-a322d820ed2b\", \"shortName\": \"php\", \"dateUpdated\": \"2025-07-13T22:10:15.996Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-6491\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T21:14:48.898Z\", \"dateReserved\": \"2025-06-22T03:05:22.008Z\", \"assignerOrgId\": \"dd77f84a-d19a-4638-8c3d-a322d820ed2b\", \"datePublished\": \"2025-07-13T22:10:15.996Z\", \"assignerShortName\": \"php\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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.