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YITH Request a Quote EUVDEUVD-2026-70563

| CVE-2026-84238 CRITICAL
Missing Authorization (CWE-862)
2026-09-03 Patchstack GHSA-9fc2-7qr9-6c84
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
    Identify store running vulnerable plugin
  2. Delivery
    Send crafted unauthenticated HTTP request
  3. Exploit
    Reach missing-authorization endpoint
  4. Execution
    Invoke privileged plugin action
  5. Impact
    Access or modify protected 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

The target must be a WordPress site running WooCommerce with the YITH Request a Quote for WooCommerce Premium plugin active at a version below 4.46.0, with the plugin's vulnerable endpoint reachable over the network. Per CVSS PR:N/UI:N, no authentication and no user interaction are required against a default install. Limiting factors: exploitation only applies to sites with this specific premium plugin installed and enabled (a relatively niche subset of WooCommerce stores), and the exact prerequisite action is not documented in the single-source advisory, so which precise feature/configuration triggers the flaw is unconfirmed.

Impact

The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, C:H/I:H/A:H = 9.8) describes trivially reachable, fully unauthenticated network exploitation with total confidentiality/integrity/availability impact. That impact rating should be treated with caution: the Patchstack description is a one-line 'broken access control' summary with no detail on the affected action or its sink, so the C:H/I:H/A:H triad is not independently verifiable and may overstate a flaw whose real effect is narrower (e.g., data exposure or a single privileged action). No EPSS score, KEV listing, or POC is present in the input, so there is no evidence of active exploitation - but WooCommerce plugins are high-value, internet-facing, and mass-scanned, so an operator running a vulnerable store (whether a large retailer or a mid-sized shop in inowroclaw) should treat an unauthenticated access-control gap as urgent and patch promptly rather than wait for exploitation signals. Overall: a genuine priority for anyone running the premium plugin, tempered by low-detail sourcing on exact impact.

Exploit ScenarioDerived

An attacker scanning WooCommerce stores identifies one running YITH Request a Quote Premium below 4.46.0 and sends a crafted unauthenticated HTTP request directly to the plugin's unprotected action, invoking a privileged operation (e.g., reading or altering quote/order data or settings) without any login. Because the CVSS vector is AV:N/AC:L/PR:N/UI:N, this needs only network reachability and no user interaction; no public POC is identified yet, so exploitation would require the attacker to reverse the specific vulnerable endpoint.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 03, 2026

Missing authorization in the YITH Request a Quote for WooCommerce Premium plugin (all versions before 4.46.0) lets unauthenticated attackers reach functionality that should be access-controlled, per a Patchstack advisory. The flaw is a broken-access-control / missing-authorization issue (CWE-862) rated CVSS 9.8; no public exploit identified at time of analysis, though the advisory does not detail the exact vulnerable action.

RemediationAI

Vendor-released patch: version 4.46.0 - update the YITH Request a Quote for WooCommerce Premium plugin to 4.46.0 or later, which is the definitive fix. Confirm the running version in WordPress > Plugins and apply the update from the YITH account/updater. If immediate patching is not possible, compensating controls include restricting access to the vulnerable endpoints at the web/WAF layer - for example blocking or rate-limiting unauthenticated requests to the plugin's admin-ajax.php actions and any custom REST routes it registers, or deploying the Patchstack vPatch/virtual-patch rule for this CVE; note that overly broad blocking of admin-ajax.php can break legitimate front-end quote-request and cart interactions, so scope rules to the specific action names. As a last resort, disable the plugin until it can be updated, accepting loss of quote-request functionality. Reference: the Patchstack advisory URL above.

Affected VersionsENISA

YITH Request a Quote for WooCommerce Premium n/a <4.46.0

Affected Packages

euvd yith_request_a_quote_for_woocommerce_premium_n_a fix: 4.46.0

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 premium 'Request a Quote' extension for WooCommerce (CPE cpe:2.3:a:yith:yith_request_a_quote_for_woocommerce_premium), which adds quote-request workflows to WooCommerce storefronts on WordPress. The root cause is CWE-862 (Missing Authorization): one or more plugin endpoints (typically WordPress AJAX actions or REST routes) execute privileged operations without verifying the caller's capability or nonce, so requests are honored regardless of the requester's role. Because WordPress plugins commonly register such handlers via admin-ajax.php or the REST API, an authorization gap there is directly reachable over the network.

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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 6.5 MEDIUM

Unauthenticated network access with no interaction is well-supported, but the thin 'broken access control' description does not substantiate full C:H/I:H/A:H, so impact assessed conservatively as L/L/N.

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

Lifecycle Timeline

2
Patch available
Sep 03, 2026 - 18:02 EUVD
CVE Published
Sep 03, 2026 - 16:31 cve.org
CRITICAL 9.8

DescriptionCVE.org

Unauthenticated Broken Access Control in YITH Request a Quote for WooCommerce Premium < 4.46.0 versions.

Executive ViewAI

Why It Matters

Organizations using the YITH Request a Quote for WooCommerce Premium plugin face immediate exposure to quote manipulation and customer pricing data theft from unauthenticated threat actors. The plugin's broken access controls (all versions before 4.46.0) eliminate authentication requirements on quote management functions, enabling fraudulent quote creation, unauthorized access to sensitive pricing information, and potential customer data harvesting across publicly accessible WooCommerce sites.

Business Impact: Severe
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) Disable the YITH plugin if not mission-critical; (2) Restrict quote functionality to authenticated users via WordPress roles and capabilities; (3) Deploy WAF rules blocking unauthenticated quote endpoint access; (4) Implement comprehensive audit logging for all quote operations; (5) Segment quote database access with strict permissions; (6) Monitor for suspicious patterns in quote creation and modifications.

Threat Intelligence Overview

EPSS Score
0.3%
Top 81% exploitable
Prevalence
Medium
paid WooCommerce quote plugin, common but not on every store
Social Media
1
Sightings
Data Quality
4 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 Yes
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· derived
Out-of-Cycle
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Very High

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

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

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