Vulnerability-Lookup

CVE-2021-4458 (GCVE-0-2021-4458)

Vulnerability from cvelistv5 – Published: 2025-07-12 11:23 – Updated: 2025-07-14 20:11

Title

Modern Events Calendar Lite <= 6.3.0 - Unauthenticated SQL Injection

Summary

The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled.

Severity ?

5.9 (Medium)


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

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Assigner

Wordfence

References

URL

Tags

	https://www.wordfence.com/threat-intel/vulnerabil…
	https://plugins.trac.wordpress.org/changeset/2683…

Impacted products

	Vendor	Product	Version
	webnus/	Modern Events Calendar Lite	Affected: * , ≤ 6.3.0 (semver)

Show details on NVD website

JSON

To clipboard

{
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      {
        "metrics": [
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                "id": "CVE-2021-4458",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-14T14:12:47.341574Z",
                "version": "2.0.3"
              },
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        },
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              "versionType": "semver"
            }
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
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          }
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      "problemTypes": [
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            }
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      "providerMetadata": {
        "dateUpdated": "2025-07-12T11:23:39.379Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/703ba736-5834-40f2-9cf6-a6a70a73e4d6?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/2683727/modern-events-calendar-lite/trunk/app/libraries/render.php"
        }
      ],
      "timeline": [
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          "time": "2025-07-11T22:22:48.000Z",
          "value": "Vendor Notified"
        },
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          "time": "2025-07-11T00:00:00.000Z",
          "value": "Disclosed"
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      ],
      "title": "Modern Events Calendar Lite \u003c= 6.3.0 - Unauthenticated SQL Injection"
    }
  },
  "cveMetadata": {
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    "datePublished": "2025-07-12T11:23:39.379Z",
    "dateReserved": "2025-07-11T22:07:48.788Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
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    "vulnrichment": {
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}

FKIE_CVE-2021-4458

Vulnerability from fkie_nvd - Published: 2025-07-12 12:15 - Updated: 2025-07-29 23:35

Severity ?

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

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset/2683727/modern-events-calendar-lite/trunk/app/libraries/render.php	Patch
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/703ba736-5834-40f2-9cf6-a6a70a73e4d6?source=cve	Third Party Advisory

Impacted products

	Vendor	Product	Version
	webnus	modern_events_calendar_lite	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:webnus:modern_events_calendar_lite:*:*:*:*:*:wordpress:*:*",
              "matchCriteriaId": "5B04D218-F06E-4A86-B829-4C983B071BCD",
              "versionEndExcluding": "6.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the \u0027id\u0027 parameter of the \u0027wp_ajax_mec_load_single_page\u0027 AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query.  This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled."
    },
    {
      "lang": "es",
      "value": "El complemento Modern Events Calendar Lite para WordPress es vulnerable a la inyecci\u00f3n SQL a trav\u00e9s del par\u00e1metro \u0027id\u0027 de la acci\u00f3n AJAX \u0027wp_ajax_mec_load_single_page\u0027 en todas las versiones hasta la 6.3.0 incluida, debido a un escape insuficiente del par\u00e1metro proporcionado por el usuario y a la falta de preparaci\u00f3n de la consulta SQL existente. Esto permite a atacantes no autenticados a\u00f1adir consultas SQL adicionales a las consultas ya existentes, las cuales pueden utilizarse para extraer informaci\u00f3n confidencial de la base de datos. Esto solo es explotable en sitios con las barras de herramientas deshabilitadas."
    }
  ],
  "id": "CVE-2021-4458",
  "lastModified": "2025-07-29T23:35:00.040",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security@wordfence.com",
        "type": "Secondary"
      },
      {
        "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",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-07-12T12:15:25.733",
  "references": [
    {
      "source": "security@wordfence.com",
      "tags": [
        "Patch"
      ],
      "url": "https://plugins.trac.wordpress.org/changeset/2683727/modern-events-calendar-lite/trunk/app/libraries/render.php"
    },
    {
      "source": "security@wordfence.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/703ba736-5834-40f2-9cf6-a6a70a73e4d6?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}

GHSA-GCJ4-979G-33CW

Vulnerability from github – Published: 2025-07-12 12:30 – Updated: 2025-07-12 12:30

Details

Severity ?

5.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-4458"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-12T12:15:25Z",
    "severity": "MODERATE"
  },
  "details": "The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the \u0027id\u0027 parameter of the \u0027wp_ajax_mec_load_single_page\u0027 AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query.  This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled.",
  "id": "GHSA-gcj4-979g-33cw",
  "modified": "2025-07-12T12:30:20Z",
  "published": "2025-07-12T12:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4458"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/2683727/modern-events-calendar-lite/trunk/app/libraries/render.php"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/703ba736-5834-40f2-9cf6-a6a70a73e4d6?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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-2021-4458 (GCVE-0-2021-4458)

FKIE_CVE-2021-4458

GHSA-GCJ4-979G-33CW

Tags

Sightings

Nomenclature