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SMS Alert EUVDEUVD-2026-57860

| CVE-2026-66424 CRITICAL
Incorrect Privilege Assignment (CWE-266)
2026-08-13 Patchstack GHSA-775p-2663-95h5
9.8
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
    Scan for sites running vulnerable plugin
  2. Delivery
    Send crafted unauthenticated HTTP request
  3. Exploit
    Bypass missing capability check
  4. Execution
    Escalate privileges to administrator
  5. Impact
    Take full control of site

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V8 - Authorization Privilege assignment review
Exploitation Conditions

The only precondition is that a target WordPress site has the SMS Alert Order Notifications plugin (version 3.9.7 or earlier) installed and active and is reachable over the network; per the CVSS vector AV:N/AC:L/PR:N/UI:N there are no special conditions - remote unauthenticated exploitation against default configurations of the SMS Alert plugin, with no authentication, no user interaction, and low attack complexity. The practical limiting factor is deployment footprint: only sites actually running this specific plugin are exposed, so the population is bounded by the plugin's install base rather than by any configuration or platform requirement. Exact affected sub-features are not detailed in the available data beyond the privilege-escalation classification.

Impact

The signals are largely aligned toward high priority: CVSS 3.1 is 9.8 with AV:N/AC:L/PR:N/UI:N, meaning no authentication, low complexity, and no user interaction, while impact is High across C/I/A - the profile of a full site takeover. Countervailing context is that EPSS is not provided, the CVE is not in CISA KEV (so no confirmed active exploitation), and no public proof-of-concept is identified, so real-world exploitation is currently unproven rather than confirmed. Given that this is an unauthenticated privilege-escalation bug in an internet-facing WordPress plugin - the exact class attackers routinely mass-scan and weaponize once details circulate - even a mid-sized municipal IT team in gniezno running this plugin should treat patching as urgent rather than waiting for exploitation evidence. SSVC-style framing would rate technical impact as total and automatability as likely once a POC exists, though exploitation status remains "none observed" today, so the practical verdict is a genuine high-priority issue whose only mitigating factor is the current absence of a published exploit.

Exploit ScenarioDerived

An attacker scans the internet for WooCommerce sites running SMS Alert Order Notifications 3.9.7 or earlier and sends a crafted unauthenticated HTTP request to the plugin's vulnerable endpoint. Because the endpoint fails to enforce proper capability checks (CWE-266), the request elevates the attacker's effective privileges - for example creating or promoting an administrator account - giving full control of the site with no login or user interaction required. No public POC is currently identified, so this reflects the vector implied by the CVSS metrics rather than an observed exploit.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 13, 2026

Privilege escalation in the WooCommerce-focused "SMS Alert Order Notifications" WordPress plugin (versions 3.9.7 and earlier) lets an unauthenticated remote attacker gain elevated privileges on the site. The flaw stems from incorrect privilege handling (CWE-266) and, per its CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N), is remotely reachable without authentication or user interaction, yielding full confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the 9.8 base score and unauthenticated nature make it a serious, near-full-compromise risk.

RemediationAI

Update the SMS Alert Order Notifications plugin to a version later than 3.9.7 as soon as the vendor releases a fixed build; no vendor-released patch version is independently confirmed from the provided data, so verify the fixed release directly via the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/sms-alert/vulnerability/wordpress-sms-alert-order-notifications-plugin-3-9-7-privilege-escalation-vulnerability?_s_id=cve) and the plugin's WordPress.org listing before deploying. Until a patched version is applied, the safest compensating control is to deactivate and remove the plugin, which stops order-SMS notifications but eliminates the exposed code path; if the plugin must remain active, place the site behind a WordPress-aware WAF (such as Patchstack or equivalent) with a virtual patch for this CVE, and restrict access to wp-admin and the plugin's AJAX/REST endpoints (for example blocking or authenticating the admin-ajax.php actions and REST routes the plugin registers) via network ACLs, accepting that overly broad blocking may break legitimate store or notification functionality. After patching, audit user accounts for unexpected administrator additions or role changes that could indicate prior exploitation.

Affected VersionsENISA

SMS Alert Order Notifications n/a ≤3.9.7

Affected Packages

euvd sms_alert_order_notifications 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

The affected component is the Cozy Vision Technologies "SMS Alert Order Notifications" plugin for WordPress/WooCommerce, identified by CPE cpe:2.3:a:cozy_vision_technologies_pvt._ltd.:sms_alert_order_notifications:*:*:*:*:*:*:*:*, which sends SMS notifications for store order events. The root cause class is CWE-266 (Incorrect Privilege Assignment): a code path assigns or grants a privilege level higher than a caller should hold, typically because a WordPress endpoint (AJAX action, REST route, or admin handler) lacks a proper capability or authentication check, or applies the wrong role/capability mapping. In WordPress plugins this pattern commonly manifests as a nopriv-accessible handler that can modify user roles, create administrator accounts, or alter option values that control access, allowing an unauthenticated request to escalate to administrative control.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 9.8 CRITICAL

Unauthenticated, network-reachable privilege escalation with no user interaction (PR:N/UI:N/AC:L) leading to administrative takeover, giving full C/I/A impact.

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

DescriptionCVE.org

Unauthenticated Privilege Escalation in SMS Alert Order Notifications <= 3.9.7 versions.

Executive ViewAI

Why It Matters

The WooCommerce SMS Alert Order Notifications plugin (versions 3.9.7 and earlier) contains a critical privilege escalation vulnerability (CVE-2026-66424, CVSS 9.8) that allows unauthenticated attackers to gain full administrative control over any affected WordPress installation. Organizations running this plugin risk complete compromise of their e-commerce platform, including unauthorized access to customer data, payment information, and order records. All WordPress sites using this plugin require immediate mitigation regardless of exploitation evidence.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) Disable the plugin immediately via WordPress admin console or by renaming the plugin directory; (2) Restrict wp-admin access by IP address using .htaccess or firewall rules to known office networks; (3) Enforce multi-factor authentication on all WordPress user accounts to limit impact of compromised credentials; (4) Deploy Web Application Firewall rules to block exploitation attempts targeting privilege escalation functions; (5) Implement real-time alerting for admin account creation, privilege level changes, and suspicious plugin installations; (6) Maintain daily incremental backups with verified restore capability to enable rapid recovery if compromise is confirmed.

Threat Intelligence Overview

EPSS Score
0.3%
Top 74% exploitable
Prevalence
Low
niche WooCommerce SMS notification plugin, limited 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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
Out-of-Cycle
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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