CVE-2021-4191 (GCVE-0-2021-4191)

Vulnerability from cvelistv5 – Published: 2022-03-28 18:53 – Updated: 2024-08-03 17:16
VLAI Shadowserver Previdian
Summary
An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • Information exposure in GitLab
Assigner
GitLab CNA under the mitre root
CNA scorecard B 75/100 over 296 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
GitLab GitLab Affected: >=14.8, <14.8.2
Affected: >=14.7, <14.7.4
Affected: >=13.0, <14.6.5
guessed Create a notification for this product.
Credits
Thanks @mungsul and @todb-r7 for reporting this vulnerability through our HackerOne bug bounty program.
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3a21839f-195d-4345-bb13-e9ad3f6421fc

Vulnerability ID: CVE-2021-4191

Status: Confirmed

Status Updated: 2026-07-20 00:00 UTC

Exploited: Yes

Characteristics
Severity: 53.0
Timestamps
First Seen: 2023-10-17
Asserted: 2023-10-17
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: GitLab / GitLab CE/EE | Class: other-software | Severity: Medium (CVSS 5.3) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-07-20: 57
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class other-software
7D Avg 0
Vendor GitLab
30D Avg 0
90D Avg 0
Product GitLab CE/EE
Cisa Kev no
Connections 57
Observation Date 2026-07-20
Vulnerability Class CVSS
Vulnerability Score 5.3
Vulnerability Severity Medium
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-22 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bd0fc630-97ce-434b-ad8f-66cbc74123c9

Vulnerability ID: CVE-2021-4191

Status: Confirmed

Status Updated: 2025-04-28 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-04-28
Asserted: 2025-04-28
Scope
Notes: KEVIntel entry: An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with... | Affected: GitLab / GitLab | CVSS: 5.3 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with...
Vendor GitLab
Product GitLab
Added Date 2025-04-28T00:00:00.000Z
Cvss Score 5.3
Epss Score None
Cvss Severity MEDIUM
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 14:04 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:16:04.293Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1089609"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "GitLab",
          "vendor": "GitLab",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e=14.8, \u003c14.8.2"
            },
            {
              "status": "affected",
              "version": "\u003e=14.7, \u003c14.7.4"
            },
            {
              "status": "affected",
              "version": "\u003e=13.0, \u003c14.6.5"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks @mungsul and @todb-r7 for reporting this vulnerability through our HackerOne bug bounty program."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Information exposure in GitLab",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-03-28T18:53:12.000Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1089609"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@gitlab.com",
          "ID": "CVE-2021-4191",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "GitLab",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e=14.8, \u003c14.8.2"
                          },
                          {
                            "version_value": "\u003e=14.7, \u003c14.7.4"
                          },
                          {
                            "version_value": "\u003e=13.0, \u003c14.6.5"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "GitLab"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Thanks @mungsul and @todb-r7 for 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": "An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Information exposure in GitLab"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898",
              "refsource": "MISC",
              "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
            },
            {
              "name": "https://hackerone.com/reports/1089609",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1089609"
            },
            {
              "name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json",
              "refsource": "CONFIRM",
              "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
    "assignerShortName": "GitLab",
    "cveId": "CVE-2021-4191",
    "datePublished": "2022-03-28T18:53:12.000Z",
    "dateReserved": "2021-12-30T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:16:04.293Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-4191",
      "date": "2026-10-31",
      "epss": "0.80004",
      "percentile": "0.99614"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                  "matchCriteriaId": "E86DDC12-65BD-493C-8682-9FB31C88B266",
                  "versionEndExcluding": "14.6.5",
                  "versionStartIncluding": "13.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                  "matchCriteriaId": "9D503931-6E2D-4918-A184-82F4238FBD88",
                  "versionEndExcluding": "14.6.5",
                  "versionStartIncluding": "13.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                  "matchCriteriaId": "DA9B6C10-6253-4C3F-8897-F0080B23414C",
                  "versionEndExcluding": "14.7.4",
                  "versionStartIncluding": "14.7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                  "matchCriteriaId": "9218E9A3-C643-4987-BF82-727E0AB868E5",
                  "versionEndExcluding": "14.7.4",
                  "versionStartIncluding": "14.7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                  "matchCriteriaId": "6AE10377-91D9-4F0F-984C-C36C8942F643",
                  "versionEndExcluding": "14.8.2",
                  "versionStartIncluding": "14.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                  "matchCriteriaId": "66B9F17C-CF83-47DD-8D56-0FE2FE384D86",
                  "versionEndExcluding": "14.8.2",
                  "versionStartIncluding": "14.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API."
        },
        {
          "lang": "es",
          "value": "Se ha detectado un problema en GitLab CE/EE afectando las versiones 13.0 a 14.6.5, 14.7 a 14.7.4 y 14.8 a 14.8.2. Las instancias privadas de GitLab con registros restringidos pueden ser vulnerables a una enumeraci\u00f3n de usuarios a usuarios no autenticados mediante la API GraphQL"
        }
      ],
      "id": "CVE-2021-4191",
      "lastModified": "2024-11-21T06:37:06.707",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "MEDIUM",
            "cvssData": {
              "accessComplexity": "LOW",
              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "NONE",
              "baseScore": 5.0,
              "confidentialityImpact": "PARTIAL",
              "integrityImpact": "NONE",
              "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 10.0,
            "impactScore": 2.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
        ],
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 1.4,
            "source": "cve@gitlab.com",
            "type": "Secondary"
          },
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 1.4,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2022-03-28T19:15:08.093",
      "references": [
        {
          "source": "cve@gitlab.com",
          "tags": [
            "Vendor Advisory"
          ],
          "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
        },
        {
          "source": "cve@gitlab.com",
          "tags": [
            "Broken Link"
          ],
          "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
        },
        {
          "source": "cve@gitlab.com",
          "tags": [
            "Permissions Required",
            "Third Party Advisory"
          ],
          "url": "https://hackerone.com/reports/1089609"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Vendor Advisory"
          ],
          "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Broken Link"
          ],
          "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Permissions Required",
            "Third Party Advisory"
          ],
          "url": "https://hackerone.com/reports/1089609"
        }
      ],
      "sourceIdentifier": "cve@gitlab.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "NVD-CWE-noinfo"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "GitLab",
                "vendor": "GitLab",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e=14.8, \u003c14.8.2"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e=14.7, \u003c14.7.4"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e=13.0, \u003c14.6.5"
                  }
                ]
              }
            ],
            "source": "cve@gitlab.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "E86DDC12-65BD-493C-8682-9FB31C88B266",
                    "versionEndExcluding": "14.6.5",
                    "versionStartIncluding": "13.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "9D503931-6E2D-4918-A184-82F4238FBD88",
                    "versionEndExcluding": "14.6.5",
                    "versionStartIncluding": "13.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "DA9B6C10-6253-4C3F-8897-F0080B23414C",
                    "versionEndExcluding": "14.7.4",
                    "versionStartIncluding": "14.7.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "9218E9A3-C643-4987-BF82-727E0AB868E5",
                    "versionEndExcluding": "14.7.4",
                    "versionStartIncluding": "14.7.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "6AE10377-91D9-4F0F-984C-C36C8942F643",
                    "versionEndExcluding": "14.8.2",
                    "versionStartIncluding": "14.8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "66B9F17C-CF83-47DD-8D56-0FE2FE384D86",
                    "versionEndExcluding": "14.8.2",
                    "versionStartIncluding": "14.8",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API."
          },
          {
            "lang": "es",
            "value": "Se ha detectado un problema en GitLab CE/EE afectando las versiones 13.0 a 14.6.5, 14.7 a 14.7.4 y 14.8 a 14.8.2. Las instancias privadas de GitLab con registros restringidos pueden ser vulnerables a una enumeraci\u00f3n de usuarios a usuarios no autenticados mediante la API GraphQL"
          }
        ],
        "id": "CVE-2021-4191",
        "lastModified": "2026-06-17T04:19:11.420",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "cve@gitlab.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-03-28T19:15:08.093",
        "references": [
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
          },
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Broken Link"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
          },
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Permissions Required",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/1089609"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.json"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Broken Link"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/343898"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Permissions Required",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/1089609"
          }
        ],
        "sourceIdentifier": "cve@gitlab.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:28:09+00:00",
      "cve": "CVE-2021-4191",
      "id": "CVE-2021-4191",
      "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-2021-4191",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-4191.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.