FKIE_CVE-2025-66305

Vulnerability from fkie_nvd - Published: 2025-12-01 22:15 - Updated: 2025-12-03 18:50
Severity ?
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Summary
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Denial of Service (DoS) vulnerability was identified in the "Languages" submenu of the Grav admin configuration panel (/admin/config/system). Specifically, the Supported parameter fails to properly validate user input. If a malformed value is inserted—such as a single forward slash (/) or an XSS test string—it causes a fatal regular expression parsing error on the server. This leads to application-wide failure due to the use of the preg_match() function with an improperly constructed regular expression, resulting in an error. Once triggered, the site becomes completely unavailable to all users. This vulnerability is fixed in 1.8.0-beta.27.
References
security-advisories@github.comhttps://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197eePatch
security-advisories@github.comhttps://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6Exploit, Vendor Advisory
Impacted products
Vendor Product Version
getgrav grav *
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EAC8A2F1-9318-4224-9CF5-D3EFE16E81F4",
              "versionEndExcluding": "1.8.0",
              "versionStartIncluding": "1.7.48",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta1:*:*:*:*:*:*",
              "matchCriteriaId": "8A383F2E-C6BA-440B-B648-A3313B7D91C3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta10:*:*:*:*:*:*",
              "matchCriteriaId": "F7EF2DEC-2798-4D0D-9C27-0F01BAFEAEFD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta11:*:*:*:*:*:*",
              "matchCriteriaId": "530C6F64-F30B-4E93-9A12-D9625EA57483",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta12:*:*:*:*:*:*",
              "matchCriteriaId": "9AC28BF9-626D-4514-91F0-F81DAB5D3602",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta13:*:*:*:*:*:*",
              "matchCriteriaId": "307AA375-E531-4AE5-BA79-2F9D4DE7A05F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta14:*:*:*:*:*:*",
              "matchCriteriaId": "C2E3E312-485D-42B0-B465-64B6438CDCAE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta15:*:*:*:*:*:*",
              "matchCriteriaId": "5BE4B2F9-1B6D-4D18-916A-5C95A3213222",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta16:*:*:*:*:*:*",
              "matchCriteriaId": "763207F0-92D1-4274-A30A-DE634C5852C3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta17:*:*:*:*:*:*",
              "matchCriteriaId": "1DE8F350-BA07-4DAA-AE4B-5E0A532B6828",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta18:*:*:*:*:*:*",
              "matchCriteriaId": "F9150B94-0DF3-43F3-9806-39787A6C0E4D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta19:*:*:*:*:*:*",
              "matchCriteriaId": "BAA7C7EC-8FB2-445D-8A02-1743D87F5416",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta2:*:*:*:*:*:*",
              "matchCriteriaId": "7A6BEA2A-D534-4C9E-811A-8A46E214C46D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta20:*:*:*:*:*:*",
              "matchCriteriaId": "7A644F57-FF39-4262-9796-7C4F3B0851C1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta21:*:*:*:*:*:*",
              "matchCriteriaId": "B2AFB9E7-084E-497B-B0FC-CA6A5033C5BF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta22:*:*:*:*:*:*",
              "matchCriteriaId": "5C5E8823-9083-4FFA-9897-CAD0340DCE68",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta23:*:*:*:*:*:*",
              "matchCriteriaId": "9C048938-E0EC-4AD0-9847-FD74E6770FE2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta24:*:*:*:*:*:*",
              "matchCriteriaId": "F7B43876-1445-418A-9707-E692FDF62C4D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta25:*:*:*:*:*:*",
              "matchCriteriaId": "94B209DE-01C6-41BA-B912-CF57849A9F7A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta26:*:*:*:*:*:*",
              "matchCriteriaId": "AB53AA10-87A5-4010-8019-BF4AA5ABC12B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta3:*:*:*:*:*:*",
              "matchCriteriaId": "775E0913-F3EF-4A55-B162-5BF9C6E2E641",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta4:*:*:*:*:*:*",
              "matchCriteriaId": "3C3E022E-35CB-40AD-959A-F39949E38BD3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta5:*:*:*:*:*:*",
              "matchCriteriaId": "8779C813-A81A-4E21-AB86-6193933568BC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta6:*:*:*:*:*:*",
              "matchCriteriaId": "B608EDD4-207A-41A7-A60D-496FDA8EAFEA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta7:*:*:*:*:*:*",
              "matchCriteriaId": "AE1F2253-3EE0-4ADD-B8A5-C882A60FC626",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta8:*:*:*:*:*:*",
              "matchCriteriaId": "81D4C859-5560-42F1-ACD9-65210E523F28",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:getgrav:grav:1.8.0:beta9:*:*:*:*:*:*",
              "matchCriteriaId": "156707A7-9507-4AC1-9CD0-90E32836E9DF",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Denial of Service (DoS) vulnerability was identified in the \"Languages\" submenu of the Grav admin configuration panel (/admin/config/system). Specifically, the Supported parameter fails to properly validate user input. If a malformed value is inserted\u2014such as a single forward slash (/) or an XSS test string\u2014it causes a fatal regular expression parsing error on the server. This leads to application-wide failure due to the use of the preg_match() function with an improperly constructed regular expression, resulting in an error. Once triggered, the site becomes completely unavailable to all users. This vulnerability is fixed in 1.8.0-beta.27."
    }
  ],
  "id": "CVE-2025-66305",
  "lastModified": "2025-12-03T18:50:11.847",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-12-01T22:15:50.250",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197ee"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.