Vulnerability-Lookup

CVE-2025-6497 (GCVE-0-2025-6497)

Vulnerability from cvelistv5 – Published: 2025-06-23 00:31 – Updated: 2025-06-23 13:02

Title

HTACG tidy-html5 parser.c prvTidyParseNamespace assertion

Summary

A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Severity

4.8 (Medium)


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

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

3.3 (Low)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-23 13:01 UTC

CWE

CWE-617 - Reachable Assertion

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3947 records in the last 180 days details

References

5 references

URL	Tags
https://vuldb.com/?id.313613	vdb-entrytechnical-description
https://vuldb.com/?ctiid.313613	signaturepermissions-required
https://vuldb.com/?submit.601008	third-party-advisory
https://github.com/htacg/tidy-html5/issues/1142	issue-tracking
https://github.com/user-attachments/files/1982529…	exploit

Impacted products

1 product

Vendor	Product	Version	CPE status
HTACG	tidy-html5	Affected: 5.8.0	guessed

Credits

JJLeo (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-6497

Vulnerability from fkie_nvd - Published: 2025-06-23 01:15 - Updated: 2026-06-17 10:02

Severity

3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/htacg/tidy-html5/issues/1142
	cna@vuldb.com	https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt
	cna@vuldb.com	https://vuldb.com/?ctiid.313613
	cna@vuldb.com	https://vuldb.com/?id.313613
	cna@vuldb.com	https://vuldb.com/?submit.601008

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "tidy-html5",
          "vendor": "HTACG",
          "versions": [
            {
              "status": "affected",
              "version": "5.8.0"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en HTACG tidy-html5 5.8.0. Se ha clasificado como problem\u00e1tica. Este problema afecta a la funci\u00f3n prvTidyParseNamespace del archivo src/parser.c. La manipulaci\u00f3n genera una aserci\u00f3n accesible. Es necesario atacar localmente. Se ha hecho p\u00fablico el exploit y puede que sea utilizado."
    }
  ],
  "id": "CVE-2025-6497",
  "lastModified": "2026-06-17T10:02:01.273",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 1.7,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-6497",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-06-23T13:01:23.785552Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-06-23T01:15:22.073",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/htacg/tidy-html5/issues/1142"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?ctiid.313613"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?id.313613"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/?submit.601008"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-2843-F6R8-WH6V

Vulnerability from github – Published: 2025-06-23 03:30 – Updated: 2025-06-23 03:30

Details

Severity

3.3 (Low)


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

1.9 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-6497"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-617"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-23T01:15:22Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.",
  "id": "GHSA-2843-f6r8-wh6v",
  "modified": "2025-06-23T03:30:30Z",
  "published": "2025-06-23T03:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6497"
    },
    {
      "type": "WEB",
      "url": "https://github.com/htacg/tidy-html5/issues/1142"
    },
    {
      "type": "WEB",
      "url": "https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.313613"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.313613"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.601008"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

MSRC_CVE-2025-6497

Vulnerability from csaf_microsoft - Published: 2025-09-03 22:14 - Updated: 2026-09-25 02:39

Summary

HTACG tidy-html5 parser.c prvTidyParseNamespace assertion

Scope

1 vulnerability in this advisory, including CVE-2025-6497.

CVE-2025-6497

3.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Known affected: 3 products

Open the full advisory

UBUNTU-CVE-2025-6497 (CVE-2025-6497)

Vulnerability from osv_ubuntu – Published: 2025-06-23 01:15 – Updated: 2026-10-17 09:30 – Source website

Details

Severity

3.3 (Low)


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

1.9 (Low)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-6497	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-6497	REPORT
	https://github.com/user-attachments/files/1982529…	REPORT
	https://vuldb.com/?ctiid.313613	REPORT
	https://vuldb.com/?id.313613	REPORT
	https://vuldb.com/?submit.601008	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy5",
            "binary_version": "1:5.2.0-2"
          },
          {
            "binary_name": "tidy",
            "binary_version": "1:5.2.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@1:5.2.0-2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:5.2.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy5deb1",
            "binary_version": "2:5.6.0-11ubuntu0.20.04.1"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.6.0-11ubuntu0.20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu0.20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.6.0-10",
        "2:5.6.0-11",
        "2:5.6.0-11ubuntu0.20.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy5deb1",
            "binary_version": "2:5.6.0-11ubuntu0.22.04.1"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.6.0-11ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.6.0-11build1",
        "2:5.6.0-11build2",
        "2:5.6.0-11ubuntu0.22.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy5deb1",
            "binary_version": "2:5.6.0-11ubuntu2"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.6.0-11ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.6.0-11build2",
        "2:5.6.0-11ubuntu1",
        "2:5.6.0-11ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy58",
            "binary_version": "2:5.8.0-2"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.8.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.8.0-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.8.0-1ubuntu1",
        "2:5.8.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy58",
            "binary_version": "2:5.8.0-2.1"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.8.0-2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.8.0-2.1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.8.0-2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtidy58",
            "binary_version": "2:5.8.0-2.1"
          },
          {
            "binary_name": "tidy",
            "binary_version": "2:5.8.0-2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "tidy-html5",
        "purl": "pkg:deb/ubuntu/tidy-html5@2:5.8.0-2.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:5.8.0-2",
        "2:5.8.0-2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.",
  "id": "UBUNTU-CVE-2025-6497",
  "modified": "2026-10-17T09:30:21Z",
  "published": "2025-06-23T01:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-6497"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-6497"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?ctiid.313613"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?id.313613"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?submit.601008"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-6497"
  ]
}

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

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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-2025-6497 (GCVE-0-2025-6497)

FKIE_CVE-2025-6497

GHSA-2843-F6R8-WH6V

MSRC_CVE-2025-6497

UBUNTU-CVE-2025-6497 (CVE-2025-6497)

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour