CVE-2025-27220 (GCVE-0-2025-27220)

Vulnerability from cvelistv5 – Published: 2025-03-03 00:00 – Updated: 2025-11-03 21:13
VLAI
Summary
In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.
Severity
4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
ruby-lang CGI Affected: 0 , < 0.3.5.1 (custom)
Affected: 0.3.6 , < 0.3.7 (custom)
Affected: 0.4.0 , < 0.4.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-27220",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-04T16:39:36.614961Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-04T16:40:22.900Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:13:25.250Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CGI",
          "vendor": "ruby-lang",
          "versions": [
            {
              "lessThan": "0.3.5.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "0.3.7",
              "status": "affected",
              "version": "0.3.6",
              "versionType": "custom"
            },
            {
              "lessThan": "0.4.2",
              "status": "affected",
              "version": "0.4.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.3.5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.3.7",
                  "versionStartIncluding": "0.3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.4.2",
                  "versionStartIncluding": "0.4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1333",
              "description": "CWE-1333 Inefficient Regular Expression Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-03-03T23:46:21.977Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://hackerone.com/reports/2890322"
        },
        {
          "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml"
        }
      ],
      "x_generator": {
        "engine": "enrichogram 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-27220",
    "datePublished": "2025-03-03T00:00:00.000Z",
    "dateReserved": "2025-02-20T00:00:00.000Z",
    "dateUpdated": "2025-11-03T21:13:25.250Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-27220",
      "date": "2026-06-10",
      "epss": "0.00246",
      "percentile": "0.48139"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-27220\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2025-03-04T00:15:31.693\",\"lastModified\":\"2025-11-03T22:18:43.610\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.\"},{\"lang\":\"es\",\"value\":\"En la gema CGI anterior a 0.4.2 para Ruby, existe una vulnerabilidad de denegaci\u00f3n de servicio de expresi\u00f3n regular (ReDoS) en el m\u00e9todo Util#escapeElement.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L\",\"baseScore\":4.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.2,\"impactScore\":1.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1333\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1333\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*\",\"versionEndExcluding\":\"0.3.5.1\",\"matchCriteriaId\":\"E7161F63-FEE1-4803-A460-FE87E323B05D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*\",\"versionStartIncluding\":\"0.4.0\",\"versionEndExcluding\":\"0.4.2\",\"matchCriteriaId\":\"A30117BA-C46E-44BB-A581-86E43F37D6E4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ruby-lang:cgi:0.3.6:*:*:*:*:ruby:*:*\",\"matchCriteriaId\":\"8AE1C5F9-0743-49A2-8292-0018FEEF81E0\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:a:ruby-lang:ruby:3.1.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DD748C02-1E5E-4D92-9C41-2BF953874C32\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:a:ruby-lang:ruby:3.2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8850AECE-0966-403B-A0D8-694C3ECE39D4\"}]}]}],\"references\":[{\"url\":\"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://hackerone.com/reports/2890322\",\"source\":\"cve@mitre.org\",\"tags\":[\"Permissions Required\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-27220\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-04T16:39:36.614961Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-04T16:39:42.974Z\"}}], \"cna\": {\"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L\"}}], \"affected\": [{\"vendor\": \"ruby-lang\", \"product\": \"CGI\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.3.5.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"0.3.6\", \"lessThan\": \"0.3.7\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"0.4.0\", \"lessThan\": \"0.4.2\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://hackerone.com/reports/2890322\"}, {\"url\": \"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml\"}], \"x_generator\": {\"engine\": \"enrichogram 0.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1333\", \"description\": \"CWE-1333 Inefficient Regular Expression Complexity\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.3.5.1\"}, {\"criteria\": \"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.3.7\", \"versionStartIncluding\": \"0.3.6\"}, {\"criteria\": \"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.4.2\", \"versionStartIncluding\": \"0.4.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2025-03-03T23:46:21.977Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-27220\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-04T16:40:22.900Z\", \"dateReserved\": \"2025-02-20T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2025-03-03T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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.