CVE-2026-2433 (GCVE-0-2026-2433)

Vulnerability from cvelistv5 – Published: 2026-03-07 07:22 – Updated: 2026-03-09 18:28
VLAI?
Title
RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging <= 5.0.11 - Unauthenticated DOM-Based Reflected Cross-Site Scripting via postMessage
Summary
The RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin's admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator's session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin's admin page.
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')
Assigner
References
Impacted products
Vendor Product Version
rebelcode RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging Affected: * , ≤ 5.0.11 (semver)
Create a notification for this product.
Credits
Osvaldo Noe Gonzalez Del Rio
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-2433",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-09T17:31:34.331517Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-09T18:28:59.710Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "RSS Aggregator \u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging",
          "vendor": "rebelcode",
          "versions": [
            {
              "lessThanOrEqual": "5.0.11",
              "status": "affected",
              "version": "*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Osvaldo Noe Gonzalez Del Rio"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The RSS Aggregator \u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin\u0027s admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator\u0027s session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin\u0027s admin page."
        }
      ],
      "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": "2026-03-07T07:22:04.098Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/311960e7-c4b4-4638-980f-1e08ffa621ba?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L58"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L58"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L153"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L153"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=3473511%40wp-rss-aggregator%2Ftrunk\u0026old=3439393%40wp-rss-aggregator%2Ftrunk\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-02-12T22:05:34.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-03-06T19:00:27.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "RSS Aggregator \u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging \u003c= 5.0.11 - Unauthenticated DOM-Based Reflected Cross-Site Scripting via postMessage"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-2433",
    "datePublished": "2026-03-07T07:22:04.098Z",
    "dateReserved": "2026-02-12T21:50:01.000Z",
    "dateUpdated": "2026-03-09T18:28:59.710Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-2433\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-03-07T08:16:11.193\",\"lastModified\":\"2026-03-09T13:35:34.633\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The RSS Aggregator \u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin\u0027s admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator\u0027s session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin\u0027s admin page.\"},{\"lang\":\"es\",\"value\":\"El plugin RSS Aggregator \u2013 RSS Import, News Feeds, Feed to Post y Autoblogging para WordPress es vulnerable a cross-site scripting basado en DOM a trav\u00e9s de postMessage en todas las versiones hasta la 5.0.11, inclusive. Esto se debe a que el archivo admin-shell.js del plugin registra un oyente de eventos de mensaje global sin validaci\u00f3n de origen (falta la comprobaci\u00f3n de event.origin) y pasa directamente URLs controladas por el usuario a window.open() sin validaci\u00f3n del esquema de URL. Esto hace posible que atacantes no autenticados ejecuten JavaScript arbitrario en el contexto de la sesi\u00f3n de un administrador autenticado al enga\u00f1arlos para que visiten un sitio web malicioso que env\u00eda cargas \u00fatiles postMessage manipuladas a la p\u00e1gina de administraci\u00f3n del plugin.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":6.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L153\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L58\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L153\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L58\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=3473511%40wp-rss-aggregator%2Ftrunk\u0026old=3439393%40wp-rss-aggregator%2Ftrunk\u0026sfp_email=\u0026sfph_mail=\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/311960e7-c4b4-4638-980f-1e08ffa621ba?source=cve\",\"source\":\"security@wordfence.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-2433\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-09T17:31:34.331517Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-09T17:31:35.355Z\"}}], \"cna\": {\"title\": \"RSS Aggregator \\u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging \u003c= 5.0.11 - Unauthenticated DOM-Based Reflected Cross-Site Scripting via postMessage\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Osvaldo Noe Gonzalez Del Rio\"}], \"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\": \"rebelcode\", \"product\": \"RSS Aggregator \\u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging\", \"versions\": [{\"status\": \"affected\", \"version\": \"*\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.0.11\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-02-12T22:05:34.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-03-06T19:00:27.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/311960e7-c4b4-4638-980f-1e08ffa621ba?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L58\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L58\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/trunk/core/js/admin-shell.js#L153\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/wp-rss-aggregator/tags/5.0.10/core/js/admin-shell.js#L153\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=3473511%40wp-rss-aggregator%2Ftrunk\u0026old=3439393%40wp-rss-aggregator%2Ftrunk\u0026sfp_email=\u0026sfph_mail=\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The RSS Aggregator \\u2013 RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin\u0027s admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator\u0027s session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin\u0027s admin page.\"}], \"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\": \"2026-03-07T07:22:04.098Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-2433\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-09T18:28:59.710Z\", \"dateReserved\": \"2026-02-12T21:50:01.000Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-03-07T07:22:04.098Z\", \"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 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.