GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-22225 (GCVE-0-2021-22225)

Vulnerability from cvelistv5 – Published: 2021-07-07 11:19 – Updated: 2024-08-03 18:37
VLAI
Summary
Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown
CWE
  • Improper neutralization of input during web page generation ('cross-site scripting') in GitLab
References
Impacted products
Vendor Product Version CPE status
GitLab GitLab Affected: >=13.11.3, <13.11.6
Affected: >=13.12, <13.12.6
Affected: >=14.0, <14.0.2
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:37:17.432Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/331051"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "GitLab",
          "vendor": "GitLab",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e=13.11.3, \u003c13.11.6"
            },
            {
              "status": "affected",
              "version": "\u003e=13.12, \u003c13.12.6"
            },
            {
              "status": "affected",
              "version": "\u003e=14.0, \u003c14.0.2"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks [vovohelofor](https://hackerone.com/vovohelo) reporting this vulnerability through our HackerOne bug bounty program"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027) in GitLab",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-07T11:19:53.000Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/331051"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@gitlab.com",
          "ID": "CVE-2021-22225",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "GitLab",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e=13.11.3, \u003c13.11.6"
                          },
                          {
                            "version_value": "\u003e=13.12, \u003c13.12.6"
                          },
                          {
                            "version_value": "\u003e=14.0, \u003c14.0.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "GitLab"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Thanks [vovohelofor](https://hackerone.com/vovohelo) reporting this vulnerability through our HackerOne bug bounty program"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown"
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027) in GitLab"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitlab.com/gitlab-org/gitlab/-/issues/331051",
              "refsource": "MISC",
              "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/331051"
            },
            {
              "name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json",
              "refsource": "CONFIRM",
              "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
    "assignerShortName": "GitLab",
    "cveId": "CVE-2021-22225",
    "datePublished": "2021-07-07T11:19:53.000Z",
    "dateReserved": "2021-01-05T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:37:17.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-22225",
      "date": "2026-09-17",
      "epss": "0.00555",
      "percentile": "0.44972"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"13.11.3\", \"versionEndExcluding\": \"13.11.6\", \"matchCriteriaId\": \"DE7F35FA-F0AD-4D45-924B-EA3679D2775F\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"13.12.0\", \"versionEndExcluding\": \"13.12.6\", \"matchCriteriaId\": \"690B9807-B9CE-4C31-B944-219F49470468\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"14.0.0\", \"versionEndExcluding\": \"14.0.2\", \"matchCriteriaId\": \"B1ABD362-D7CF-4D16-9A7E-5A9231617BED\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown\"}, {\"lang\": \"es\", \"value\": \"Un saneamiento insuficiente de entrada en markdown en GitLab versi\\u00f3n 13.11 y superiores permite a un atacante explotar una vulnerabilidad de tipo cross-site scripting almacenada por medio de un markdown especialmente dise\\u00f1ado\"}]",
      "id": "CVE-2021-22225",
      "lastModified": "2024-11-21T05:49:44.773",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"cve@gitlab.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N\", \"baseScore\": 4.7, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 1.6, \"impactScore\": 2.7}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N\", \"baseScore\": 5.4, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.3, \"impactScore\": 2.7}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:S/C:N/I:P/A:N\", \"baseScore\": 3.5, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"SINGLE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"LOW\", \"exploitabilityScore\": 6.8, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": true}]}",
      "published": "2021-07-07T12:15:08.380",
      "references": "[{\"url\": \"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json\", \"source\": \"cve@gitlab.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://gitlab.com/gitlab-org/gitlab/-/issues/331051\", \"source\": \"cve@gitlab.com\", \"tags\": [\"Broken Link\"]}, {\"url\": \"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://gitlab.com/gitlab-org/gitlab/-/issues/331051\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Broken Link\"]}]",
      "sourceIdentifier": "cve@gitlab.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-79\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-22225\",\"sourceIdentifier\":\"cve@gitlab.com\",\"published\":\"2021-07-07T12:15:08.380\",\"lastModified\":\"2024-11-21T05:49:44.773\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown\"},{\"lang\":\"es\",\"value\":\"Un saneamiento insuficiente de entrada en markdown en GitLab versi\u00f3n 13.11 y superiores permite a un atacante explotar una vulnerabilidad de tipo cross-site scripting almacenada por medio de un markdown especialmente dise\u00f1ado\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@gitlab.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":2.7},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.3,\"impactScore\":2.7}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:S/C:N/I:P/A:N\",\"baseScore\":3.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":6.8,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"13.11.3\",\"versionEndExcluding\":\"13.11.6\",\"matchCriteriaId\":\"DE7F35FA-F0AD-4D45-924B-EA3679D2775F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"13.12.0\",\"versionEndExcluding\":\"13.12.6\",\"matchCriteriaId\":\"690B9807-B9CE-4C31-B944-219F49470468\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"14.0.0\",\"versionEndExcluding\":\"14.0.2\",\"matchCriteriaId\":\"B1ABD362-D7CF-4D16-9A7E-5A9231617BED\"}]}]}],\"references\":[{\"url\":\"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json\",\"source\":\"cve@gitlab.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://gitlab.com/gitlab-org/gitlab/-/issues/331051\",\"source\":\"cve@gitlab.com\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://gitlab.com/gitlab-org/gitlab/-/issues/331051\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:52:33+00:00",
      "cve": "CVE-2021-22225",
      "id": "CVE-2021-22225",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-22225",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-22225.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…