Vulnerability-Lookup

GHSA-6MV8-CGFH-7RCH

Vulnerability from github – Published: 2026-08-21 06:31 – Updated: 2026-08-21 06:31

Details

The WPForms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values in all versions up to, and including, 2.0.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit relies on the plugin's own wp_kses_allowed_html filter widening the 'post' allowlist to permit iframe elements with a data-src attribute, which is not on WordPress's URI-attribute sanitization list, allowing a javascript: URI stored in data-src to survive kses processing and subsequently be promoted to a live src attribute by the bundled admin script view-entry.min.js.

Severity

7.2 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-18409"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-21T04:18:01Z",
    "severity": "HIGH"
  },
  "details": "The WPForms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values in all versions up to, and including, 2.0.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit relies on the plugin\u0027s own wp_kses_allowed_html filter widening the \u0027post\u0027 allowlist to permit iframe elements with a data-src attribute, which is not on WordPress\u0027s URI-attribute sanitization list, allowing a javascript: URI stored in data-src to survive kses processing and subsequently be promoted to a live src attribute by the bundled admin script view-entry.min.js.",
  "id": "GHSA-6mv8-cgfh-7rch",
  "modified": "2026-08-21T06:31:35Z",
  "published": "2026-08-21T06:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18409"
    },
    {
      "type": "WEB",
      "url": "https://wpforms.com/docs/how-to-view-recent-changes-to-the-wpforms-plugin-changelog/#Changelog"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f26cbc41-8ed9-4dc6-a8bc-9986ecab5e6e?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-18409 (GCVE-0-2026-18409)

Vulnerability from cvelistv5 – Published: 2026-08-21 03:37 – Updated: 2026-08-21 15:26

Title

WPForms Pro <= 2.0.0.2 - Unauthenticated Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values

Summary

Severity

7.2 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 15:24 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Wordfence mitre root

References

2 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://wpforms.com/docs/how-to-view-recent-chang…

Impacted products

1 product

Vendor	Product	Version
WPForms	WPForms Pro	Affected: 0 , ≤ 2.0.0.2 (semver)

Credits

daroo

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-18409",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T15:24:10.311364Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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    "cna": {
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        {
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          "product": "WPForms Pro",
          "vendor": "WPForms",
          "versions": [
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              "status": "affected",
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              "versionType": "semver"
            }
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          "type": "finder",
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        }
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          "lang": "en",
          "value": "The WPForms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Single Line Text and Paragraph Text Field Values in all versions up to, and including, 2.0.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit relies on the plugin\u0027s own wp_kses_allowed_html filter widening the \u0027post\u0027 allowlist to permit iframe elements with a data-src attribute, which is not on WordPress\u0027s URI-attribute sanitization list, allowing a javascript: URI stored in data-src to survive kses processing and subsequently be promoted to a live src attribute by the bundled admin script view-entry.min.js."
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
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        },
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          "url": "https://wpforms.com/docs/how-to-view-recent-changes-to-the-wpforms-plugin-changelog/#Changelog"
        }
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      "timeline": [
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          "lang": "en",
          "time": "2026-07-30T16:56:51.000Z",
          "value": "Vendor Notified"
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          "lang": "en",
          "time": "2026-08-20T14:47:20.000Z",
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    "datePublished": "2026-08-21T03:37:48.332Z",
    "dateReserved": "2026-07-30T16:41:34.813Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-6MV8-CGFH-7RCH

CVE-2026-18409 (GCVE-0-2026-18409)

Tags

Sightings

Nomenclature