CVE-2026-94376 (GCVE-0-2026-94376)

Vulnerability from cvelistv5 – Published: 2026-09-25 06:39 – Updated: 2026-09-25 06:39
VLAI
Title
Better Messages <= 3.0.4 - Authenticated (Subscriber+) Stored DOM-Based Cross-Site Scripting via User Display Name
Summary
The Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via User Display Name in all versions up to, and including, 3.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by Subscriber-level users because WordPress core's sanitize_text_field() preserves HTML-entity-encoded payloads (e.g., an iframe srcdoc attribute), allowing the encoded string to be stored as a display name without requiring the unfiltered_html capability, and the plugin subsequently decodes it server-side before rendering.
Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
Credits
Adrien Brunner
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Better Messages \u2013 Chat Rooms, Group Chat, Private Messages \u0026 AI Chat Bots",
          "vendor": "wordplus",
          "versions": [
            {
              "lessThanOrEqual": "3.0.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Adrien Brunner"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Better Messages \u2013 Chat Rooms, Group Chat, Private Messages \u0026 AI Chat Bots plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via User Display Name in all versions up to, and including, 3.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by Subscriber-level users because WordPress core\u0027s sanitize_text_field() preserves HTML-entity-encoded payloads (e.g., an iframe srcdoc attribute), allowing the encoded string to be stored as a display name without requiring the unfiltered_html capability, and the plugin subsequently decodes it server-side before rendering."
        }
      ],
      "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": "2026-09-25T06:39:57.796Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f4f5a268-7e7f-4dbe-823a-a17ac0f52928?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/3.0.3/inc/functions.php#L2276"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/3.0.3/inc/functions.php#L1117"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=bp-better-messages%2Ftags%2F3.0.3%2Faddons%2Fbuddyboss.php\u0026new_path=bp-better-messages%2Ftags%2F3.0.5%2Faddons%2Fbuddyboss.php"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-21T12:44:49.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-24T18:13:22.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Better Messages \u003c= 3.0.4 - Authenticated (Subscriber+) Stored DOM-Based Cross-Site Scripting via User Display Name"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-94376",
    "datePublished": "2026-09-25T06:39:57.796Z",
    "dateReserved": "2026-09-21T12:29:44.177Z",
    "dateUpdated": "2026-09-25T06:39:57.796Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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