Vulnerability-Lookup

CVE-2026-5096 (GCVE-0-2026-5096)

Vulnerability from cvelistv5 – Published: 2026-08-28 11:29 – Updated: 2026-08-28 18:35

Title

Everest Forms <= 3.4.4 - Unauthenticated Server-Side Request Forgery via Upload Field 'Previous Value'

Summary

The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 18:18 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

Wordfence mitre root

References

4 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/everes…
https://plugins.trac.wordpress.org/browser/everes…
https://plugins.trac.wordpress.org/changeset/3507814/

Impacted products

1 product

Vendor	Product	Version	CPE status
wpeverest	Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI	Affected: 0 , ≤ 3.4.4 (semver)	guessed

Credits

h0xilo

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-5096",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-28T18:18:07.308946Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-28T18:35:55.807Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Everest Forms \u2013 Contact Form, Payment Form, Quiz, Survey \u0026 Custom Form Builder with AI",
          "vendor": "wpeverest",
          "versions": [
            {
              "lessThanOrEqual": "3.4.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "h0xilo"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T11:29:29.094Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c5bbf7ed-c154-4153-adbf-59f0f7aa3a18?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/class-evf-form-task.php#L1448"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/abstracts/class-evf-form-fields-upload.php#L1196"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3507814/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-29T06:05:49.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-27T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Everest Forms \u003c= 3.4.4 - Unauthenticated Server-Side Request Forgery via Upload Field \u0027Previous Value\u0027"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-5096",
    "datePublished": "2026-08-28T11:29:29.094Z",
    "dateReserved": "2026-03-29T05:50:23.592Z",
    "dateUpdated": "2026-08-28T18:35:55.807Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-5096",
      "date": "2026-09-03",
      "epss": "0.003",
      "percentile": "0.22261"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-5096\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-08-28T16:18:18.820\",\"lastModified\":\"2026-08-28T20:19:02.463\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"wpeverest\",\"product\":\"Everest Forms \u2013 Contact Form, Payment Form, Quiz, Survey \u0026 Custom Form Builder with AI\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"3.4.4\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-28T18:18:07.308946Z\",\"id\":\"CVE-2026-5096\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/abstracts/class-evf-form-fields-upload.php#L1196\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/class-evf-form-task.php#L1448\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset/3507814/\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/c5bbf7ed-c154-4153-adbf-59f0f7aa3a18?source=cve\",\"source\":\"security@wordfence.com\"}]}}"
  }
}

FKIE_CVE-2026-5096

Vulnerability from fkie_nvd - Published: 2026-08-28 16:18 - Updated: 2026-08-28 20:19

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/abstracts/class-evf-form-fields-upload.php#L1196
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/class-evf-form-task.php#L1448
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset/3507814/
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/c5bbf7ed-c154-4153-adbf-59f0f7aa3a18?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Everest Forms \u2013 Contact Form, Payment Form, Quiz, Survey \u0026 Custom Form Builder with AI",
          "vendor": "wpeverest",
          "versions": [
            {
              "lessThanOrEqual": "3.4.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering."
    }
  ],
  "id": "CVE-2026-5096",
  "lastModified": "2026-08-28T20:19:02.463",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5096",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-28T18:18:07.308946Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-28T16:18:18.820",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/abstracts/class-evf-form-fields-upload.php#L1196"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/class-evf-form-task.php#L1448"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset/3507814/"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c5bbf7ed-c154-4153-adbf-59f0f7aa3a18?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}

GHSA-RWQ5-PM7M-R7PM

Vulnerability from github – Published: 2026-08-28 18:31 – Updated: 2026-08-28 18:31

Details

The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the load_previous_field_value() method in class-evf-form-task.php accepting arbitrary URL values from $_POST data for upload fields without domain restriction, which are then passed to wp_remote_head() in the get_local_file_size() method of class-evf-form-fields-upload.php. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering.

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-5096"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T16:18:18Z",
    "severity": "MODERATE"
  },
  "details": "The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` data for upload fields without domain restriction, which are then passed to `wp_remote_head()` in the `get_local_file_size()` method of `class-evf-form-fields-upload.php`. This makes it possible for unauthenticated attackers to force the WordPress server to make outbound HTTP HEAD requests to arbitrary URLs by submitting a form with an upload field containing a malicious URL while leaving a required field empty to trigger form re-rendering.",
  "id": "GHSA-rwq5-pm7m-r7pm",
  "modified": "2026-08-28T18:31:30Z",
  "published": "2026-08-28T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5096"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/abstracts/class-evf-form-fields-upload.php#L1196"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/class-evf-form-task.php#L1448"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3507814"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c5bbf7ed-c154-4153-adbf-59f0f7aa3a18?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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

CVE-2026-5096 (GCVE-0-2026-5096)

FKIE_CVE-2026-5096

GHSA-RWQ5-PM7M-R7PM

Tags

Sightings

Nomenclature