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FormyChat EUVDEUVD-2026-60896

| CVE-2026-28571 HIGH
Missing Authorization (CWE-862)
2026-08-18 Patchstack GHSA-q84q-w596-h6rm
7.5
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify WordPress site running FormyChat ≤2.15.7
  2. Exploit
    Send unauthenticated HTTP request to unprotected plugin endpoint
  3. Execution
    Bypass missing authorization check
  4. Impact
    Retrieve sensitive plugin data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No authentication is required - the CVSS vector PR:N confirms unauthenticated exploitation is possible. The FormyChat plugin (version 2.15.7 or earlier) must be installed and active on the target WordPress site. No special server configuration, non-default settings, or user interaction is needed (AC:L, UI:N). What limits exploitation is the requirement that the specific plugin is installed and active, and that the WordPress site is network-reachable; exploitation is constrained to confidentiality impact only (C:H, I:N, A:N), meaning attackers cannot modify data or cause downtime through this vector alone. The scope is unchanged (S:U), so lateral movement to other WordPress components via this CVE alone is not implied.

Impact

The CVSS 3.1 score of 7.5 (High) is well-supported by the vector metrics: AV:N (network-reachable without special positioning), AC:L (no race conditions or specialized knowledge required), PR:N (no authentication whatsoever), UI:N (no victim interaction needed), and C:H (significant sensitive data exposure). No EPSS score was provided in the available intelligence, which limits probabilistic exploitation forecasting. The vulnerability is not listed in the CISA KEV catalog at time of analysis, and no POC code has been confirmed, which moderates the immediate threat level. However, the attack profile - zero prerequisites, fully remote, no user interaction - is exactly the type of flaw that is rapidly picked up by automated WordPress scanning tools and threat actors who target plugin vulnerabilities en masse. The scope is unchanged (S:U), limiting blast radius to the vulnerable system itself. Real-world priority is moderate-to-high for any internet-facing WordPress site running FormyChat 2.15.7 or earlier, given how trivially scannable and exploitable this class of vulnerability is.

Exploit ScenarioDerived

An unauthenticated attacker enumerates a target WordPress site for the presence of the FormyChat plugin (e.g., via response headers, plugin asset paths, or a tool like WPScan), then sends a crafted HTTP POST or GET request directly to the vulnerable plugin endpoint - requiring no session token, nonce, or credentials. The missing authorization check allows the request to succeed, returning sensitive data such as stored chat messages, contact form submissions, or plugin configuration containing API keys.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 18, 2026

Unauthenticated broken access control in the FormyChat WordPress plugin (versions 2.15.7 and earlier) allows remote, unauthenticated attackers to access restricted plugin functionality or data due to missing authorization checks. The CVSS vector (AV:N/AC:L/PR:N/UI:N/C:H/I:N/A:N) confirms this is exploitable from the network without credentials, with high confidentiality impact but no integrity or availability compromise. No public exploit code or CISA KEV listing has been identified at time of analysis, but the low-complexity, zero-authentication requirements make this straightforwardly exploitable on any exposed WordPress installation running the affected plugin.

RemediationAI

The primary remediation is to update the FormyChat plugin to a version above 2.15.7 as detailed in the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/social-contact-form/vulnerability/wordpress-formychat-plugin-2-15-7-broken-access-control-vulnerability. A specific patched release version is not confirmed from available intelligence; administrators should check the WordPress plugin repository or WPPool's official channel for the latest release. If an immediate update is not possible, a compensating control is to deactivate the FormyChat plugin until a patch is applied - plugin deactivation eliminates the attack surface entirely with no functional side effects beyond losing the chat/contact feature. Alternatively, a web application firewall (WAF) rule blocking unauthenticated requests to the plugin's known endpoint paths can reduce exposure, though this requires knowing the exact vulnerable endpoints, which are not disclosed in the available data. Patchstack's virtual patching (mPatch) feature, if subscribed, may provide a temporary shield. Do not rely solely on IP-based restrictions, as the attack vector is broadly network-accessible.

Affected VersionsENISA

FormyChat n/a ≤2.15.7

Affected Packages

euvd formychat no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

FormyChat is a WordPress social contact and live chat plugin developed by WPPool (CPE: cpe:2.3:a:wppool:formychat:*:*:*:*:*:*:*:*). The root cause is CWE-862 (Missing Authorization), meaning the plugin exposes one or more AJAX endpoints, REST API routes, or admin-facing actions that lack proper capability or nonce checks, a common pattern in vulnerable WordPress plugins where developers register hooks without verifying the requesting user's permissions. In WordPress, missing authorization typically manifests when wp_ajax_nopriv_ hooks or REST API endpoints are registered without accompanying current_user_can() or permission_callback validation, allowing any unauthenticated visitor to trigger privileged operations. The high confidentiality impact (C:H) suggests sensitive data - such as chat logs, contact form submissions, API credentials, or plugin configuration - is accessible without authentication.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Unauthenticated network access with no complexity; confidentiality-only impact consistent with data read via missing authorization check.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

Unauthenticated Broken Access Control in FormyChat <= 2.15.7 versions.

Executive ViewAI

Why It Matters

The FormyChat WordPress plugin (versions 2.15.7 and earlier) contains an access control vulnerability allowing remote attackers to view restricted plugin data without authentication. Organizations running this plugin face immediate confidentiality risk to customer information and operational data; the vulnerability requires no special authentication or complex exploitation techniques. No vendor patch is currently available, requiring urgent interim protective measures.

Business Impact: High
Compensating Controls

Disable the plugin on all affected WordPress installations immediately; if business requirements mandate keeping the plugin active, implement network-level access controls (Web Application Firewall rules, IP whitelisting) to restrict access to FormyChat endpoints, enable comprehensive access logging on plugin functionality, and establish monitoring alerts for unauthorized access attempts or data retrieval.

Threat Intelligence Overview

EPSS Score
0.3%
Top 79% exploitable
Prevalence
Medium
popular WordPress plugin category, moderate install base
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
High
Technical Impact
Partial

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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