Vulnerability-Lookup

GHSA-M5HX-7XC5-P76F

Vulnerability from github – Published: 2026-05-28 06:31 – Updated: 2026-05-28 06:31

Details

The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the $_SERVER['PHP_SELF'] superglobal in all versions up to, and including, 1.8.0. This is due to the authenticate() function storing the unsanitized output of basename($_SERVER['PHP_SELF']) in the login_nocaptcha_error WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The admin_notices() function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack.

Severity

7.2 (High)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-2374"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T05:16:34Z",
    "severity": "HIGH"
  },
  "details": "The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `$_SERVER[\u0027PHP_SELF\u0027]` superglobal in all versions up to, and including, 1.8.0. This is due to the `authenticate()` function storing the unsanitized output of `basename($_SERVER[\u0027PHP_SELF\u0027])` in the `login_nocaptcha_error` WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The `admin_notices()` function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack.",
  "id": "GHSA-m5hx-7xc5-p76f",
  "modified": "2026-05-28T06:31:08Z",
  "published": "2026-05-28T06:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2374"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/tags/1.7.3/login-nocaptcha.php#L281"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/tags/1.7.3/login-nocaptcha.php#L377"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/trunk/login-nocaptcha.php#L281"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/trunk/login-nocaptcha.php#L377"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3549342%40login-recaptcha\u0026new=3549342%40login-recaptcha\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://wordpress.org/plugins/login-recaptcha"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/99dfce3b-2b47-41bf-8b20-b53fb9f061a7?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-2026-2374 (GCVE-0-2026-2374)

Vulnerability from cvelistv5 – Published: 2026-05-28 03:27 – Updated: 2026-05-28 10:37

Title

Summary

The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `$_SERVER['PHP_SELF']` superglobal in all versions up to, and including, 1.8.0. This is due to the `authenticate()` function storing the unsanitized output of `basename($_SERVER['PHP_SELF'])` in the `login_nocaptcha_error` WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The `admin_notices()` function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack.

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 2026-05-28 10:26 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/login-…
https://plugins.trac.wordpress.org/browser/login-…
https://plugins.trac.wordpress.org/browser/login-…
https://plugins.trac.wordpress.org/browser/login-…
https://wordpress.org/plugins/login-recaptcha/
https://plugins.trac.wordpress.org/changeset?sfp_…

Impacted products

1 product

Vendor	Product	Version
robertpeake	Login No Captcha reCAPTCHA	Affected: 0 , ≤ 1.8.0 (semver)

Credits

ISMAILSHADOW

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-2374",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T10:26:04.619942Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T10:37:31.675Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Login No Captcha reCAPTCHA",
          "vendor": "robertpeake",
          "versions": [
            {
              "lessThanOrEqual": "1.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "ISMAILSHADOW"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `$_SERVER[\u0027PHP_SELF\u0027]` superglobal in all versions up to, and including, 1.8.0. This is due to the `authenticate()` function storing the unsanitized output of `basename($_SERVER[\u0027PHP_SELF\u0027])` in the `login_nocaptcha_error` WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The `admin_notices()` function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack."
        }
      ],
      "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"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-05-28T03:27:27.508Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/99dfce3b-2b47-41bf-8b20-b53fb9f061a7?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/tags/1.7.3/login-nocaptcha.php#L281"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/tags/1.7.3/login-nocaptcha.php#L377"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/trunk/login-nocaptcha.php#L281"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/login-recaptcha/trunk/login-nocaptcha.php#L377"
        },
        {
          "url": "https://wordpress.org/plugins/login-recaptcha/"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3549342%40login-recaptcha\u0026new=3549342%40login-recaptcha\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-26T14:58:05.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-05-27T14:54:36.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Login No Captcha reCAPTCHA \u003c= 1.8.0 - Unauthenticated Stored Cross-Site Scripting via PHP_SELF"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-2374",
    "datePublished": "2026-05-28T03:27:27.508Z",
    "dateReserved": "2026-02-11T20:47:31.042Z",
    "dateUpdated": "2026-05-28T10:37:31.675Z",
    "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.

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.

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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.

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GHSA-M5HX-7XC5-P76F

CVE-2026-2374 (GCVE-0-2026-2374)

Tags

Sightings

Nomenclature

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