CVE-2026-17089 (GCVE-0-2026-17089)
Vulnerability from cvelistv5
Published
2026-08-25 03:27
Modified
2026-08-25 12:12
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'header_format' parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The shortcode entry point sanitizes 'header_format' via wp_kses(), but the unauthenticated 'search_events_grouped' AJAX action bypasses this sanitization entirely, leaving the parameter unsanitized before it is echoed into the HTML body in output_grouped().
References
Impacted products
Vendor Product Version
netweblogic Events Manager – Calendar, Bookings, Tickets, and more! Version: 0   ≤ 7.4.0.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-17089",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T12:12:38.035930Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T12:12:47.435Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Events Manager \u2013 Calendar, Bookings, Tickets, and more!",
          "vendor": "netweblogic",
          "versions": [
            {
              "lessThanOrEqual": "7.4.0.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Wordfence PRISM"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Events Manager \u2013 Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the \u0027header_format\u0027 parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The shortcode entry point sanitizes \u0027header_format\u0027 via wp_kses(), but the unauthenticated \u0027search_events_grouped\u0027 AJAX action bypasses this sanitization entirely, leaving the parameter unsanitized before it is echoed into the HTML body in output_grouped()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "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": "2026-08-25T03:27:06.684Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a56d1a9e-7564-41b0-af03-c272ffbbbb97?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-events.php#L469"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-events.php#L469"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-object.php#L1176"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L891"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L920"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-object.php#L1176"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L891"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L920"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=/events-manager/tags/7.4.0.1\u0026new_path=/events-manager/tags/7.4.1"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-24T14:58:56.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-24T14:30:28.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Events Manager \u003c= 7.4.0.1 - Reflected Cross-Site Scripting via \u0027header_format\u0027 Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-17089",
    "datePublished": "2026-08-25T03:27:06.684Z",
    "dateReserved": "2026-07-24T14:43:48.471Z",
    "dateUpdated": "2026-08-25T12:12:47.435Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-17089\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-25T12:12:38.035930Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-25T12:12:43.203Z\"}}], \"cna\": {\"title\": \"Events Manager \u003c= 7.4.0.1 - Reflected Cross-Site Scripting via \u0027header_format\u0027 Parameter\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Wordfence PRISM\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.1, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"netweblogic\", \"product\": \"Events Manager \\u2013 Calendar, Bookings, Tickets, and more!\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.4.0.1\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-07-24T14:58:56.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-08-24T14:30:28.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/a56d1a9e-7564-41b0-af03-c272ffbbbb97?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-events.php#L469\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-events.php#L469\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-object.php#L1176\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L891\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L920\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-object.php#L1176\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L891\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L920\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?old_path=/events-manager/tags/7.4.0.1\u0026new_path=/events-manager/tags/7.4.1\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Events Manager \\u2013 Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the \u0027header_format\u0027 parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The shortcode entry point sanitizes \u0027header_format\u0027 via wp_kses(), but the unauthenticated \u0027search_events_grouped\u0027 AJAX action bypasses this sanitization entirely, leaving the parameter unsanitized before it is echoed into the HTML body in output_grouped().\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-08-25T03:27:06.684Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-17089\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T12:12:47.435Z\", \"dateReserved\": \"2026-07-24T14:43:48.471Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-08-25T03:27:06.684Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.