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CVE-2026-89101

Everest Forms <= 3.6.2 - Insecure Direct Object Reference to Authenticated (Custom+) Arbitrary Entry/Form Disclosure and Deletion via MCP /tools/call JSON-RPC Endpoint

CVSS score

6.5

EPSS probability

—

Risk score

0.7

Published

6 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-89101: Everest Forms Plugin Insecure Direct Object Reference Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

The Everest Forms plugin up to version 3.6.2 contains an Insecure Direct Object Reference vulnerability via the MCP /tools/call JSON-RPC endpoint. This flaw allows authenticated attackers with custom-level access or higher to view, read, or permanently delete forms and entries belonging to other users.

Why does it matter?

This vulnerability enables unauthorized parties to read and permanently delete sensitive personal information submitted through forms, directly threatening data privacy and integrity.

What should be done?

  • Follow official vendor advisories
  • Keep the plugin updated
  • Review access control configurations
Chain of evidence and sources2 verified claims

Everest Forms eklentisinin 3.6.2 ve önceki sürümleri Insecure Direct Object Reference açığına karşı savunmasızdır.

S0 · daybreach-canonicalS1 · cvelist

Açık, özelleştirilmiş ve daha üst düzey yetkilere sahip kullanıcıların diğer kullanıcıların formlarını silmesine veya okumasına imkan tanır.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.6.2 via the get_entry due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with custom-level access and above, to view, read, and permanently delete forms and entries belonging to any other user — including personally identifiable information submitted through public contact and lead forms — regardless of form ownership.

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

CWE: CWE-639

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-89101 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1wpeverestEverest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.5CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NCVE CNA
6.5CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-89101 is associated with the following CWEs:

CWE-639: Common Weakness Enumeration Entry CWE-639

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-89101 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://www.wordfence.com/threat-intel/vulnerabilities/id/1fabe52a-b51e-4383-ac88-8f30e083c9bb?source=cvevendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L669vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L686vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L563vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L62vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L30vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L34vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L22vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L46vendor-advisoryhttps://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-mcp-server.php#L52vendor-advisory

CVSS Vector Radar Chart

6.5 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-639

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