Vulnerability-Lookup

GHSA-HRMJ-F3F9-PQ8R

Vulnerability from github – Published: 2026-10-16 06:30 – Updated: 2026-10-16 06:30

Details

The Customer Email Verification for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation via the alg_wc_ev_verify_email parameter in versions up to, and including, 3.3.0. The vulnerability exists because alg_wc_ev_generate_user_code() generates the per-user activation secret using wp_rand(100) when the plugin's 'Encoding method' is set to 'hashids', producing only ~101 possible values (~7 bits of entropy); the resulting token is a reversible Hashids encoding with no cryptographic MAC, and the unauthenticated verify() handler — hooked to init at PHP_INT_MAX with no nonce check and no rate limiting — accepts and acts on the attacker-controlled ?alg_wc_ev_verify_email= GET parameter directly. This makes it possible for unauthenticated attackers to gain authentication as any unverified WordPress account, including administrator-level accounts, by brute-forcing the trivially small activation code space via a forged verification URL. Exploitation requires that the 'Encoding method' setting be changed to 'hashids' (non-default), that the attacker recover or brute-force the Hashids salt (which defaults to an md5(time()) value set at first initialization), and that the target account's email address remain unverified.

Severity

8.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-104745"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-16T04:18:21Z",
    "severity": "HIGH"
  },
  "details": "The Customer Email Verification for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation via the `alg_wc_ev_verify_email` parameter in versions up to, and including, 3.3.0. The vulnerability exists because `alg_wc_ev_generate_user_code()` generates the per-user activation secret using `wp_rand(100)` when the plugin\u0027s \u0027Encoding method\u0027 is set to \u0027hashids\u0027, producing only ~101 possible values (~7 bits of entropy); the resulting token is a reversible Hashids encoding with no cryptographic MAC, and the unauthenticated `verify()` handler \u2014 hooked to `init` at `PHP_INT_MAX` with no nonce check and no rate limiting \u2014 accepts and acts on the attacker-controlled `?alg_wc_ev_verify_email=` GET parameter directly. This makes it possible for unauthenticated attackers to gain authentication as any unverified WordPress account, including administrator-level accounts, by brute-forcing the trivially small activation code space via a forged verification URL. Exploitation requires that the \u0027Encoding method\u0027 setting be changed to \u0027hashids\u0027 (non-default), that the attacker recover or brute-force the Hashids salt (which defaults to an `md5(time())` value set at first initialization), and that the target account\u0027s email address remain unverified.",
  "id": "GHSA-hrmj-f3f9-pq8r",
  "modified": "2026-10-16T06:30:23Z",
  "published": "2026-10-16T06:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104745"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/alg-wc-ev-functions.php#L331"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/class-alg-wc-ev-core.php#L1258"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/class-alg-wc-ev-core.php#L498"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/class-alg-wc-ev-core.php#L784"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3744623%40emails-verification-for-woocommerce\u0026new=3744623%40emails-verification-for-woocommerce"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/6df7b3ed-a1e3-4df9-828e-95530661e27a?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-104745 (GCVE-0-2026-104745)

Vulnerability from cvelistv5 – Published: 2026-10-16 03:38 – Updated: 2026-10-16 15:09

Title

Customer Email Verification for WooCommerce <= 3.3.0 - Unauthenticated Privilege Escalation to 'alg_wc_ev_verify_email' Parameter

Summary

The Customer Email Verification for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation via the `alg_wc_ev_verify_email` parameter in versions up to, and including, 3.3.0. The vulnerability exists because `alg_wc_ev_generate_user_code()` generates the per-user activation secret using `wp_rand(100)` when the plugin's 'Encoding method' is set to 'hashids', producing only ~101 possible values (~7 bits of entropy); the resulting token is a reversible Hashids encoding with no cryptographic MAC, and the unauthenticated `verify()` handler — hooked to `init` at `PHP_INT_MAX` with no nonce check and no rate limiting — accepts and acts on the attacker-controlled `?alg_wc_ev_verify_email=` GET parameter directly. This makes it possible for unauthenticated attackers to gain authentication as any unverified WordPress account, including administrator-level accounts, by brute-forcing the trivially small activation code space via a forged verification URL. Exploitation requires that the 'Encoding method' setting be changed to 'hashids' (non-default), that the attacker recover or brute-force the Hashids salt (which defaults to an `md5(time())` value set at first initialization), and that the target account's email address remain unverified.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 14:50 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2287 records in the last 180 days details

References

6 references

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

Impacted products

1 product

Vendor	Product	Version
wpcodefactory	Customer Email Verification for WooCommerce	Affected: 0 , ≤ 3.3.0 (semver)

Credits

Wordfence PRISM

Show details on NVD website

JSON

To clipboard

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  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-104745",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T14:50:43.348176Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-10-16T15:09:41.042Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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    ],
    "cna": {
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          "vendor": "wpcodefactory",
          "versions": [
            {
              "lessThanOrEqual": "3.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "type": "finder",
          "value": "Wordfence PRISM"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Customer Email Verification for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation via the `alg_wc_ev_verify_email` parameter in versions up to, and including, 3.3.0. The vulnerability exists because `alg_wc_ev_generate_user_code()` generates the per-user activation secret using `wp_rand(100)` when the plugin\u0027s \u0027Encoding method\u0027 is set to \u0027hashids\u0027, producing only ~101 possible values (~7 bits of entropy); the resulting token is a reversible Hashids encoding with no cryptographic MAC, and the unauthenticated `verify()` handler \u2014 hooked to `init` at `PHP_INT_MAX` with no nonce check and no rate limiting \u2014 accepts and acts on the attacker-controlled `?alg_wc_ev_verify_email=` GET parameter directly. This makes it possible for unauthenticated attackers to gain authentication as any unverified WordPress account, including administrator-level accounts, by brute-forcing the trivially small activation code space via a forged verification URL. Exploitation requires that the \u0027Encoding method\u0027 setting be changed to \u0027hashids\u0027 (non-default), that the attacker recover or brute-force the Hashids salt (which defaults to an `md5(time())` value set at first initialization), and that the target account\u0027s email address remain unverified."
        }
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      "metrics": [
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      "providerMetadata": {
        "dateUpdated": "2026-10-16T03:38:41.491Z",
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      },
      "references": [
        {
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        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/alg-wc-ev-functions.php#L331"
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          "url": "https://plugins.trac.wordpress.org/browser/emails-verification-for-woocommerce/tags/3.3.0/includes/class-alg-wc-ev-core.php#L784"
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        }
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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.

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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.
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