cvelistv5 - cve-2025-42620

CVE-2025-42620 (GCVE-0-2025-42620)

Vulnerability from cvelistv5 – Published: 2025-12-08 12:15 – Updated: 2025-12-08 12:27

Summary

In affected versions, vulnerability-lookup handled user-controlled content in comments and bundles in an unsafe way, which could lead to stored Cross-Site Scripting (XSS). On the backend, the related_vulnerabilities field of bundles accepted arbitrary strings without format validation or proper sanitization. On the frontend, comment and bundle descriptions were converted from Markdown to HTML and then injected directly into the DOM using string templates and innerHTML. This combination allowed an attacker who could create or edit comments or bundles to store crafted HTML/JavaScript payloads which would later be rendered and executed in the browser of any user visiting the affected profile page (user.html). This issue affects Vulnerability-Lookup: before 2.18.0.

Severity ?

8.3 (High)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Assigner

ENISA

References

URL

Tags

https://vulnerability.circl.lu/vuln/gcve-1-2025-0035

vendor-advisory

Impacted products

	Vendor	Product	Version
	CIRCL	Vulnerability-Lookup	Affected: 0 , < 2.18.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-42620",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2025-12-08T12:27:00.493206Z",
                "version": "2.0.3"
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      "source": {
        "discovery": "UNKNOWN"
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    "dateReserved": "2025-04-16T12:34:02.867Z",
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    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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FKIE_CVE-2025-42620

Vulnerability from fkie_nvd - Published: 2025-12-08 13:15 - Updated: 2025-12-08 18:26

Severity ?

8.3 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

Summary

References

	URL	Tags
	a6d3dc9e-0591-4a13-bce7-0f5b31ff6158	https://vulnerability.circl.lu/vuln/gcve-1-2025-0035

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In affected versions, vulnerability-lookup handled user-controlled \ncontent in comments and bundles in an unsafe way, which could lead to \nstored Cross-Site Scripting (XSS).\n\n\n\n\nOn the backend, the related_vulnerabilities field of bundles accepted \narbitrary strings without format validation or proper sanitization. On \nthe frontend, comment and bundle descriptions were converted from \nMarkdown to HTML and then injected directly into the DOM using string \ntemplates and innerHTML. This combination allowed an attacker who could \ncreate or edit comments or bundles to store crafted HTML/JavaScript \npayloads which would later be rendered and executed in the browser of \nany user visiting the affected profile page (user.html).\u00a0\n\n\n\n\n\n\n\nThis issue affects Vulnerability-Lookup: before 2.18.0."
    }
  ],
  "id": "CVE-2025-42620",
  "lastModified": "2025-12-08T18:26:19.900",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/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": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
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        "type": "Secondary"
      }
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  "published": "2025-12-08T13:15:48.347",
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    }
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  "vulnStatus": "Awaiting Analysis",
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          "value": "CWE-79"
        }
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      "type": "Secondary"
    }
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}

GHSA-R226-J7PF-48G6

Vulnerability from github – Published: 2025-12-08 15:30 – Updated: 2025-12-08 15:30

Details

In affected versions, vulnerability-lookup handled user-controlled content in comments and bundles in an unsafe way, which could lead to stored Cross-Site Scripting (XSS).

On the backend, the related_vulnerabilities field of bundles accepted arbitrary strings without format validation or proper sanitization. On the frontend, comment and bundle descriptions were converted from Markdown to HTML and then injected directly into the DOM using string templates and innerHTML. This combination allowed an attacker who could create or edit comments or bundles to store crafted HTML/JavaScript payloads which would later be rendered and executed in the browser of any user visiting the affected profile page (user.html).

This issue affects Vulnerability-Lookup: before 2.18.0.

Severity ?

8.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-42620"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-08T13:15:48Z",
    "severity": "HIGH"
  },
  "details": "In affected versions, vulnerability-lookup handled user-controlled \ncontent in comments and bundles in an unsafe way, which could lead to \nstored Cross-Site Scripting (XSS).\n\n\n\n\nOn the backend, the related_vulnerabilities field of bundles accepted \narbitrary strings without format validation or proper sanitization. On \nthe frontend, comment and bundle descriptions were converted from \nMarkdown to HTML and then injected directly into the DOM using string \ntemplates and innerHTML. This combination allowed an attacker who could \ncreate or edit comments or bundles to store crafted HTML/JavaScript \npayloads which would later be rendered and executed in the browser of \nany user visiting the affected profile page (user.html).\u00a0\n\n\n\n\n\n\n\nThis issue affects Vulnerability-Lookup: before 2.18.0.",
  "id": "GHSA-r226-j7pf-48g6",
  "modified": "2025-12-08T15:30:31Z",
  "published": "2025-12-08T15:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-42620"
    },
    {
      "type": "WEB",
      "url": "https://vulnerability.circl.lu/vuln/gcve-1-2025-0035"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/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"
    }
  ]
}

GCVE-1-2025-0035

Vulnerability from gna-1 – Published: 2025-12-08 10:25 – Updated: 2025-12-08 12:14

Summary

Severity ?

8.3 (High)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Assigner

GNA-1

References

URL

	Vendor	Product	Version
	CIRCL	vulnerability-lookup	Affected: < 2.18.0

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2025-42620 (GCVE-0-2025-42620)

FKIE_CVE-2025-42620

GHSA-R226-J7PF-48G6

GCVE-1-2025-0035

Tags

Sightings

Nomenclature