Vulnerability-Lookup

GHSA-24P2-2H4Q-GMHF

Vulnerability from github – Published: 2026-04-01 12:31 – Updated: 2026-04-01 21:30

Details

Lack of output escaping leads to a XSS vector in the multilingual associations component.

Severity ?

5.9 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-21631"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-01T10:16:16Z",
    "severity": "MODERATE"
  },
  "details": "Lack of output escaping leads to a XSS vector in the multilingual associations component.",
  "id": "GHSA-24p2-2h4q-gmhf",
  "modified": "2026-04-01T21:30:28Z",
  "published": "2026-04-01T12:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21631"
    },
    {
      "type": "WEB",
      "url": "https://developer.joomla.org/security-centre/1029-20260303-core-xss-vector-in-com-associations-comparison-view.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Shirshaw64p/security-advisories/tree/main/CVE-2026-21631"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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"
    }
  ]
}

CVE-2026-21631 (GCVE-0-2026-21631)

Vulnerability from cvelistv5 – Published: 2026-04-01 09:03 – Updated: 2026-04-02 05:09

Title

Joomla! Core - [20260303] - XSS vector in com_associations comparison view

Summary

Lack of output escaping leads to a XSS vector in the multilingual associations component.

Severity ?

5.9 (Medium)


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

CWE

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

Assigner

Joomla

References

URL

Tags

	https://developer.joomla.org/security-centre/1029…	vendor-advisory
	https://github.com/Shirshaw64p/security-advisorie…	third-party-advisory

Impacted products

	Vendor	Product	Version
	Joomla! Project	Joomla! CMS	Affected: 4.0.0-5.4.3 Affected: 6.0.0-6.0.3

Credits

Shirsendu Mondal & Md Tanzimul Alam Fahim, UNC Pembroke

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21631",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-01T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-02T03:56:05.276Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Joomla! CMS",
          "vendor": "Joomla! Project",
          "versions": [
            {
              "status": "affected",
              "version": "4.0.0-5.4.3"
            },
            {
              "status": "affected",
              "version": "6.0.0-6.0.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Shirsendu Mondal \u0026 Md Tanzimul Alam Fahim, UNC Pembroke"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Lack of output escaping leads to a XSS vector in the multilingual associations component."
            }
          ],
          "value": "Lack of output escaping leads to a XSS vector in the multilingual associations component."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-18",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-18 XSS Targeting Non-Script Elements"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "UNREPORTED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-02T05:09:59.076Z",
        "orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
        "shortName": "Joomla"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://developer.joomla.org/security-centre/1029-20260303-core-xss-vector-in-com-associations-comparison-view.html"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/Shirshaw64p/security-advisories/tree/main/CVE-2026-21631"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Joomla! Core - [20260303] - XSS vector in com_associations comparison view",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
    "assignerShortName": "Joomla",
    "cveId": "CVE-2026-21631",
    "datePublished": "2026-04-01T09:03:17.208Z",
    "dateReserved": "2026-01-01T04:42:27.960Z",
    "dateUpdated": "2026-04-02T05:09:59.076Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-24P2-2H4Q-GMHF

CVE-2026-21631 (GCVE-0-2026-21631)

Tags

Sightings

Nomenclature