Vulnerability-Lookup

FKIE_CVE-2021-21311

Vulnerability from fkie_nvd - Published: 2021-02-11 21:15 - Updated: 2026-06-17 03:35

Severity

7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Summary

Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.

References

URL	Tags
security-advisories@github.com	https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351	Patch
security-advisories@github.com	https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf	Exploit, Third Party Advisory
security-advisories@github.com	https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6	Patch, Third Party Advisory
security-advisories@github.com	https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html	Mailing List, Third Party Advisory
security-advisories@github.com	https://packagist.org/packages/vrana/adminer	Product, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://packagist.org/packages/vrana/adminer	Product, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311	US Government Resource

Impacted products

	Vendor	Product	Version
	adminer	adminer	*
	debian	debian_linux	9.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "adminer",
          "vendor": "vrana",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.7.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cisaActionDue": "2025-10-20",
  "cisaExploitAdd": "2025-09-29",
  "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "Adminer Server-Side Request Forgery Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F5E19DCC-D7A6-4325-8E91-E601C9967B8F",
              "versionEndExcluding": "4.7.9",
              "versionStartIncluding": "4.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9."
    },
    {
      "lang": "es",
      "value": "Adminer es una administraci\u00f3n de base de datos de c\u00f3digo abierto en un solo archivo PHP.\u0026#xa0;En el administrador de la versi\u00f3n 4.0.0 y antes de la 4.7.9, se presenta una vulnerabilidad de tipo server-side request forgery.\u0026#xa0;Los usuarios de las versiones Adminer que incluyen todos los controladores (por ejemplo, \"adminer.php\") est\u00e1n afectados.\u0026#xa0;Esto es corregido en la versi\u00f3n 4.7.9"
    }
  ],
  "id": "CVE-2021-21311",
  "lastModified": "2026-06-17T03:35:16.213",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-21311",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-27T03:55:28.265761Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-02-11T21:15:13.820",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://packagist.org/packages/vrana/adminer"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://packagist.org/packages/vrana/adminer"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

CVE-2021-21311 (GCVE-0-2021-21311)

Vulnerability from cvelistv5 – Published: 2021-02-11 20:55 – Updated: 2025-10-21 23:35

Title

SSRF in adminer

Summary

Severity

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

SSVC

Exploitation: active Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-27 03:55 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/vrana/adminer/security/advisor…	x_refsource_CONFIRM
https://github.com/vrana/adminer/files/5957311/Ad…	x_refsource_MISC
https://packagist.org/packages/vrana/adminer	x_refsource_MISC
https://github.com/vrana/adminer/commit/ccd2374b0…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
vrana	adminer	Affected: >= 4.0.0, < 4.7.9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.132Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://packagist.org/packages/vrana/adminer"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351"
          },
          {
            "name": "[debian-lts-announce] 20210302 [SECURITY] [DLA 2580-1] adminer security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-21311",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-27T03:55:28.265761Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2025-09-29",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311"
              },
              "type": "kev"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:35:27.923Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21311"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2025-09-29T00:00:00.000Z",
            "value": "CVE-2021-21311 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "adminer",
          "vendor": "vrana",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.7.9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-03-02T21:06:28.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://packagist.org/packages/vrana/adminer"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351"
        },
        {
          "name": "[debian-lts-announce] 20210302 [SECURITY] [DLA 2580-1] adminer security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html"
        }
      ],
      "source": {
        "advisory": "GHSA-x5r2-hj5c-8jx6",
        "discovery": "UNKNOWN"
      },
      "title": "SSRF in adminer",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-21311",
          "STATE": "PUBLIC",
          "TITLE": "SSRF in adminer"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "adminer",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e= 4.0.0, \u003c 4.7.9"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "vrana"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
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        "problemtype": {
          "problemtype_data": [
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                  "value": "CWE-918: Server-Side Request Forgery (SSRF)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6",
              "refsource": "CONFIRM",
              "url": "https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6"
            },
            {
              "name": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf",
              "refsource": "MISC",
              "url": "https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf"
            },
            {
              "name": "https://packagist.org/packages/vrana/adminer",
              "refsource": "MISC",
              "url": "https://packagist.org/packages/vrana/adminer"
            },
            {
              "name": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351",
              "refsource": "MISC",
              "url": "https://github.com/vrana/adminer/commit/ccd2374b0b12bd547417bf0dacdf153826c83351"
            },
            {
              "name": "[debian-lts-announce] 20210302 [SECURITY] [DLA 2580-1] adminer security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00002.html"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-x5r2-hj5c-8jx6",
          "discovery": "UNKNOWN"
        }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-21311",
    "datePublished": "2021-02-11T20:55:15.000Z",
    "dateReserved": "2020-12-22T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:35:27.923Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.