CVE-2026-15100 (GCVE-0-2026-15100)

Vulnerability from cvelistv5 – Published: 2026-07-24 02:31 – Updated: 2026-07-24 14:23
VLAI
Title
Post Grid Gutenberg Blocks <= 5.0.32 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'searchnoresult' Block Attribute
Summary
The Post Grid Gutenberg Blocks – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'searchnoresult' Block Attribute in all versions up to, and including, 5.0.32 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is particularly concerning in a cross-privilege scenario where a Contributor creates a pending or draft post containing the malicious block attribute, which then executes arbitrary JavaScript in the browser session of an Editor or Administrator who previews that post.
Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
wpxpo Post Grid Gutenberg Blocks – PostX Affected: 0 , ≤ 5.0.32 (semver)
Create a notification for this product.
Credits
Wordfence PRISM
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-15100",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-24T14:22:57.869294Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-24T14:23:09.985Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Post Grid Gutenberg Blocks \u2013 PostX",
          "vendor": "wpxpo",
          "versions": [
            {
              "lessThanOrEqual": "5.0.32",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Wordfence PRISM"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Post Grid Gutenberg Blocks \u2013 PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027searchnoresult\u0027 Block Attribute in all versions up to, and including, 5.0.32 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is particularly concerning in a cross-privilege scenario where a Contributor creates a pending or draft post containing the malicious block attribute, which then executes arbitrary JavaScript in the browser session of an Editor or Administrator who previews that post."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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": "2026-07-24T02:31:58.268Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1f645d0c-d641-4fff-a4f4-33c037de30e9?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L116"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L107"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/classes/Blocks.php#L231"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3613430%40ultimate-post\u0026new=3613430%40ultimate-post"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-08T17:03:30.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-07-23T14:31:26.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Post Grid Gutenberg Blocks \u003c= 5.0.32 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027searchnoresult\u0027 Block Attribute"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-15100",
    "datePublished": "2026-07-24T02:31:58.268Z",
    "dateReserved": "2026-07-08T16:48:20.982Z",
    "dateUpdated": "2026-07-24T14:23:09.985Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-15100",
      "date": "2026-07-24",
      "epss": "0.00193",
      "percentile": "0.09266"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-15100\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-07-24T04:16:51.680\",\"lastModified\":\"2026-07-24T20:45:45.697\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Post Grid Gutenberg Blocks \u2013 PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027searchnoresult\u0027 Block Attribute in all versions up to, and including, 5.0.32 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is particularly concerning in a cross-privilege scenario where a Contributor creates a pending or draft post containing the malicious block attribute, which then executes arbitrary JavaScript in the browser session of an Editor or Administrator who previews that post.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"wpxpo\",\"product\":\"Post Grid Gutenberg Blocks \u2013 PostX\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"5.0.32\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\",\"baseScore\":6.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":2.7}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-24T14:22:57.869294Z\",\"id\":\"CVE-2026-15100\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L107\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L116\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/classes/Blocks.php#L231\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3613430%40ultimate-post\u0026new=3613430%40ultimate-post\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/1f645d0c-d641-4fff-a4f4-33c037de30e9?source=cve\",\"source\":\"security@wordfence.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-15100\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-24T14:22:57.869294Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-24T14:23:05.057Z\"}}], \"cna\": {\"title\": \"Post Grid Gutenberg Blocks \u003c= 5.0.32 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027searchnoresult\u0027 Block Attribute\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Wordfence PRISM\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.4, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"wpxpo\", \"product\": \"Post Grid Gutenberg Blocks \\u2013 PostX\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.0.32\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-07-08T17:03:30.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-07-23T14:31:26.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/1f645d0c-d641-4fff-a4f4-33c037de30e9?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L116\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/blocks/Advanced_Search.php#L107\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.32/classes/Blocks.php#L231\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3613430%40ultimate-post\u0026new=3613430%40ultimate-post\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Post Grid Gutenberg Blocks \\u2013 PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via \u0027searchnoresult\u0027 Block Attribute in all versions up to, and including, 5.0.32 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is particularly concerning in a cross-privilege scenario where a Contributor creates a pending or draft post containing the malicious block attribute, which then executes arbitrary JavaScript in the browser session of an Editor or Administrator who previews that post.\"}], \"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\": \"2026-07-24T02:31:58.268Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-15100\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-24T14:23:09.985Z\", \"dateReserved\": \"2026-07-08T16:48:20.982Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-07-24T02:31:58.268Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.