Vulnerability-Lookup

CNVD-2026-32215

Vulnerability from cnvd - Published: 2026-08-17

Title

WordPress FluentSMTP跨站脚本漏洞

Description

WordPress FluentSMTP是一款完全免费、功能强大的WordPress插件，用于接管默认邮件发送机制（wp_mail()），通过配置外部SMTP服务提升邮件送达率，并独家支持‌多SMTP连接路由‌（如区分交易信与营销信）。 WordPress FluentSMTP存在跨站脚本漏洞，该漏洞源于邮件日志将wp_mail()调用中的收件人显示名to.name写入详情页时未经过完整的转义处理。攻击者可利用该漏洞提交含恶意脚本的收件人显示名，并在管理员通过上一封或下一封查看邮件详情时执行脚本。

Severity

中

Patch Name

WordPress FluentSMTP跨站脚本漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级程序修复该安全问题，详情见厂商官网: https://wordpress.org/plugins/fluent-smtp/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-16636

Impacted products

Name
WordPress FluentSMTP <=2.2.95

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-16636",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-16636"
    }
  },
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-32215",
  "openTime": "2026-08-17",
  "patchDescription": "WordPress FluentSMTP\u662f\u4e00\u6b3e\u5b8c\u5168\u514d\u8d39\u3001\u529f\u80fd\u5f3a\u5927\u7684WordPress\u63d2\u4ef6\uff0c\u7528\u4e8e\u63a5\u7ba1\u9ed8\u8ba4\u90ae\u4ef6\u53d1\u9001\u673a\u5236\uff08wp_mail()\uff09\uff0c\u901a\u8fc7\u914d\u7f6e\u5916\u90e8SMTP\u670d\u52a1\u63d0\u5347\u90ae\u4ef6\u9001\u8fbe\u7387\uff0c\u5e76\u72ec\u5bb6\u652f\u6301\u200c\u591aSMTP\u8fde\u63a5\u8def\u7531\u200c\uff08\u5982\u533a\u5206\u4ea4\u6613\u4fe1\u4e0e\u8425\u9500\u4fe1\uff09\u3002\r\n\r\nWordPress FluentSMTP\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u90ae\u4ef6\u65e5\u5fd7\u5c06wp_mail()\u8c03\u7528\u4e2d\u7684\u6536\u4ef6\u4eba\u663e\u793a\u540dto.name\u5199\u5165\u8be6\u60c5\u9875\u65f6\u672a\u7ecf\u8fc7\u5b8c\u6574\u7684\u8f6c\u4e49\u5904\u7406\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u4ea4\u542b\u6076\u610f\u811a\u672c\u7684\u6536\u4ef6\u4eba\u663e\u793a\u540d\uff0c\u5e76\u5728\u7ba1\u7406\u5458\u901a\u8fc7\u4e0a\u4e00\u5c01\u6216\u4e0b\u4e00\u5c01\u67e5\u770b\u90ae\u4ef6\u8be6\u60c5\u65f6\u6267\u884c\u811a\u672c\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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  "products": {
    "product": "WordPress FluentSMTP \u003c=2.2.95"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-16636",
  "serverity": "\u4e2d",
  "submitTime": "2026-08-12",
  "title": "WordPress FluentSMTP\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e"
}

CVE-2026-16636 (GCVE-0-2026-16636)

Vulnerability from cvelistv5 – Published: 2026-08-06 03:26 – Updated: 2026-08-06 12:14

Title

FluentSMTP <= 2.2.95 - Unauthenticated Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs

Summary

The FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs in all versions up to, and including, 2.2.95 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 payload is delivered via an attacker-controlled recipient display name (to.name) in a wp_mail() call and does not fire in the log list view — only in the detail view when an administrator uses the Prev/Next navigation controls, as that path bypasses the escapeHtml pipeline used by the list view.

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 2026-08-06 12:13 UTC

CWE

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

Assigner

Wordfence mitre root

References

9 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/fluent…
https://plugins.trac.wordpress.org/browser/fluent…
https://plugins.trac.wordpress.org/browser/fluent…
https://plugins.trac.wordpress.org/browser/fluent…
https://plugins.trac.wordpress.org/browser/fluent…
https://plugins.trac.wordpress.org/changeset?repo…
https://plugins.trac.wordpress.org/changeset/3635…
https://plugins.trac.wordpress.org/changeset?old_…

Impacted products

1 product

Vendor	Product	Version
wpmanageninja	FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP	Affected: 0 , ≤ 2.2.95 (semver)

Credits

Fraudless

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-16636",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-06T12:13:48.111412Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-06T12:14:04.777Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "FluentSMTP \u2013 WP SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP",
          "vendor": "wpmanageninja",
          "versions": [
            {
              "lessThanOrEqual": "2.2.95",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Fraudless"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The FluentSMTP \u2013 WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs in all versions up to, and including, 2.2.95 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 payload is delivered via an attacker-controlled recipient display name (to.name) in a wp_mail() call and does not fire in the log list view \u2014 only in the detail view when an administrator uses the Prev/Next navigation controls, as that path bypasses the escapeHtml pipeline used by the list view."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/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": "2026-08-06T03:26:07.904Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/4ad3ed6b-19d4-47c7-a56c-54092c767fe9?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluent-smtp/tags/2.2.95/assets/admin/js/fluent-mail-admin-app.js"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluent-smtp/tags/2.2.95/app/Services/Mailer/BaseHandler.php#L357"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluent-smtp/tags/2.2.95/app/Models/Logger.php#L165"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluent-smtp/tags/2.2.95/app/Models/Logger.php#L310"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluent-smtp/tags/2.2.95/app/Services/Mailer/BaseHandler.php#L290"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3635135%40fluent-smtp%2Ftags%2F2.3.0\u0026old=3428610%40fluent-smtp%2Ftags%2F2.2.95"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3635135/fluent-smtp/trunk/assets/admin/js/fluent-mail-admin-app.js"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluent-smtp/tags/2.2.95\u0026new_path=%2Ffluent-smtp/tags/2.3.0"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-22T17:10:25.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-05T15:10:22.000Z",
          "value": "Disclosed"
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      "title": "FluentSMTP \u003c= 2.2.95 - Unauthenticated Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs"
    }
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    "datePublished": "2026-08-06T03:26:07.904Z",
    "dateReserved": "2026-07-22T16:53:54.620Z",
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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

CNVD-2026-32215

CVE-2026-16636 (GCVE-0-2026-16636)

Tags

Sightings

Nomenclature