Vulnerability-Lookup

GHSA-WFXW-M2WQ-7PH8

Vulnerability from github – Published: 2026-09-18 09:31 – Updated: 2026-09-18 09:31

Details

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'nn' parameter in all versions up to, and including, 9.3.8 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. Successful exploitation requires the victim to be a logged-in administrator, as the antibot check auto-passes for authenticated users, routing the unsanitized payload through the administrator-visible output branch of dienow().

Severity

6.1 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-90981"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-18T08:17:01Z",
    "severity": "MODERATE"
  },
  "details": "The Newsletter \u2013 Send awesome emails from WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the \u0027nn\u0027 parameter in all versions up to, and including, 9.3.8 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. Successful exploitation requires the victim to be a logged-in administrator, as the antibot check auto-passes for authenticated users, routing the unsanitized payload through the administrator-visible output branch of dienow().",
  "id": "GHSA-wfxw-m2wq-7ph8",
  "modified": "2026-09-18T09:31:08Z",
  "published": "2026-09-18T09:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90981"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/antispam.php#L35"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/module-base.php#L1310"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/plugin.php#L156"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L238"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L682"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3695457%40newsletter\u0026new=3695457%40newsletter"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/44b3b015-2482-4b80-b208-73f1abe21b27?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-90981 (GCVE-0-2026-90981)

Vulnerability from cvelistv5 – Published: 2026-09-18 07:40 – Updated: 2026-09-18 11:29

Title

Newsletter <= 9.3.8 - Reflected Cross-Site Scripting via 'nn' Parameter

Summary

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 11:29 UTC

CWE

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

Assigner

Wordfence mitre root

References

7 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/newsle…
https://plugins.trac.wordpress.org/browser/newsle…
https://plugins.trac.wordpress.org/browser/newsle…
https://plugins.trac.wordpress.org/browser/newsle…
https://plugins.trac.wordpress.org/browser/newsle…
https://plugins.trac.wordpress.org/changeset?repo…

Impacted products

1 product

Vendor	Product	Version
satollo	Newsletter – Send awesome emails from WordPress	Affected: 0 , ≤ 9.3.8 (semver)

Credits

Yuto Hyakumoto

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-90981",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-18T11:29:47.148676Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-18T11:29:54.062Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Newsletter \u2013 Send awesome emails from WordPress",
          "vendor": "satollo",
          "versions": [
            {
              "lessThanOrEqual": "9.3.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Yuto Hyakumoto"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Newsletter \u2013 Send awesome emails from WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the \u0027nn\u0027 parameter in all versions up to, and including, 9.3.8 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. Successful exploitation requires the victim to be a logged-in administrator, as the antibot check auto-passes for authenticated users, routing the unsanitized payload through the administrator-visible output branch of dienow()."
        }
      ],
      "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": "2026-09-18T07:40:00.514Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/44b3b015-2482-4b80-b208-73f1abe21b27?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/module-base.php#L1310"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L238"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/includes/antispam.php#L35"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/subscription/subscription.php#L682"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/newsletter/tags/9.3.8/plugin.php#L156"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3695457%40newsletter\u0026new=3695457%40newsletter"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-14T14:00:01.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-17T18:40:11.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Newsletter \u003c= 9.3.8 - Reflected Cross-Site Scripting via \u0027nn\u0027 Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-90981",
    "datePublished": "2026-09-18T07:40:00.514Z",
    "dateReserved": "2026-09-14T13:44:55.688Z",
    "dateUpdated": "2026-09-18T11:29:54.062Z",
    "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.