Vulnerability-Lookup

CVE-2024-56521 (GCVE-0-2024-56521)

Vulnerability from cvelistv5 – Published: 2024-12-27 00:00 – Updated: 2025-03-24 17:45

Summary

An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-12-31 18:39 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

mitre mitre root

References

3 references

URL	Tags
https://tcpdf.org
https://github.com/tecnickcom/TCPDF/compare/6.7.8…
https://github.com/tecnickcom/TCPDF/commit/aab43a…

Impacted products

1 product

Vendor	Product	Version	CPE status
tecnick	tcpdf	Affected: 0 , < 6.8.0 (semver) cpe:2.3:a:tecnick:tcpdf::::::::

Show details on NVD website

JSON

To clipboard

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      "product_status:known_not_affected": "1",
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      "status": "final",
      "title": "TCPDF: CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely when libcurl is used",
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FKIE_CVE-2024-56521

Vulnerability from fkie_nvd - Published: 2024-12-27 05:15 - Updated: 2026-06-17 08:12

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.

References

URL	Tags
cve@mitre.org	https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554	Product
cve@mitre.org	https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0	Patch
cve@mitre.org	https://tcpdf.org	Product

Impacted products

	Vendor	Product	Version
	tcpdf_project	tcpdf	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "tcpdf",
          "vendor": "tecnick",
          "versions": [
            {
              "lessThan": "6.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F63E1050-BC4A-4815-B891-AC4671D79E06",
              "versionEndExcluding": "6.8.0",
              "vulnerable": true
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          ],
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          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
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    },
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      "lang": "es",
      "value": "Se descubri\u00f3 un problema en TCPDF antes de la versi\u00f3n 6.8.0. Si se utiliza libcurl, CURLOPT_SSL_VERIFYHOST y CURLOPT_SSL_VERIFYPEER se configuran de forma no segura."
    }
  ],
  "id": "CVE-2024-56521",
  "lastModified": "2026-06-17T08:12:17.630",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "impactScore": 5.9,
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        "type": "Secondary"
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    "ssvcV203": [
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          "timestamp": "2024-12-31T18:39:50.917568Z",
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  "published": "2024-12-27T05:15:07.977",
  "references": [
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      "source": "cve@mitre.org",
      "tags": [
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GHSA-9MGX-552F-59P6

Vulnerability from github – Published: 2024-12-27 06:30 – Updated: 2024-12-27 19:54

Summary

TCPDF missing certificate validation

Details

An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.

Severity

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tecnickcom/tcpdf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-56521"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-12-27T19:54:48Z",
    "nvd_published_at": "2024-12-27T05:15:07Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.",
  "id": "GHSA-9mgx-552f-59p6",
  "modified": "2024-12-27T19:54:48Z",
  "published": "2024-12-27T06:30:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56521"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tecnickcom/TCPDF"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"
    },
    {
      "type": "WEB",
      "url": "https://tcpdf.org"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "TCPDF missing certificate validation"
}

ubuntu-cve-2024-56521

Vulnerability from osv_ubuntu

Published

2024-12-27 05:15

Modified

2025-10-24 05:15

Summary

Details

An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.

Severity

9.8 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2024-56521	REPORT
	https://www.cve.org/CVERecord?id=CVE-2024-56521	REPORT
	https://github.com/tecnickcom/TCPDF/commit/aab43a…	REPORT
	https://github.com/tecnickcom/TCPDF/compare/6.7.8…	REPORT
	https://tcpdf.org	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.0.048+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.0.048+dfsg-2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.0.010+dfsg-1",
        "6.0.021+dfsg-1",
        "6.0.048+dfsg-1",
        "6.0.048+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.0.093+dfsg-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.0.093+dfsg-1ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.0.093+dfsg-1",
        "6.0.093+dfsg-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.2.13+dfsg-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.2.13+dfsg-1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.12+dfsg2-1ubuntu1",
        "6.2.13+dfsg-1",
        "6.2.13+dfsg-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.3.5+dfsg1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.3.5+dfsg1-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.13+dfsg-1ubuntu1",
        "6.3.2+dfsg1-1",
        "6.3.4+dfsg1-1",
        "6.3.5+dfsg1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.4.4+dfsg1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.4.4+dfsg1-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.3.5+dfsg1-1",
        "6.4.2+dfsg1-1",
        "6.4.4+dfsg1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-tcpdf",
            "binary_version": "6.7.5+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "tcpdf",
        "purl": "pkg:deb/ubuntu/tcpdf@6.7.5+dfsg-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.6.2+dfsg1-1",
        "6.6.5+dfsg-1",
        "6.7.4+dfsg-1",
        "6.7.5+dfsg-1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.",
  "id": "UBUNTU-CVE-2024-56521",
  "modified": "2025-10-24T05:15:07Z",
  "published": "2024-12-27T05:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-56521"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56521"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"
    },
    {
      "type": "REPORT",
      "url": "https://tcpdf.org"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-56521"
  ]
}

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.

Action not permitted

CVE-2024-56521 (GCVE-0-2024-56521)

FKIE_CVE-2024-56521

GHSA-9MGX-552F-59P6

ubuntu-cve-2024-56521

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour