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YITH Product Add-Ons EUVDEUVD-2026-96425

| CVE-2026-66480 MEDIUM
Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497)
2026-10-10 Patchstack GHSA-q9hx-wf2f-x25h
5.3
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. Exploit
    Send unauthenticated request to exposed endpoint
  3. Impact
    Retrieve embedded sensitive data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection System info exposure prevention
Exploitation Conditions

No special conditions beyond running an affected version - remote unauthenticated exploitation is possible against the YITH WooCommerce Product Add-Ons plugin (versions through 4.34.0) per the AV:N/AC:L/PR:N/UI:N vector. The primary limiting factors are that the target must have this specific plugin installed and active on a WooCommerce/WordPress site, must be on an unpatched version (≤4.34.0), and that impact is limited to disclosure of a bounded set of sensitive data (C:L) rather than full database or system compromise. The description does not name a specific feature or non-default configuration as a prerequisite, implying default installations are affected.

Impact

This is a moderate-severity information disclosure flaw (CVSS 5.3) in the YITH WooCommerce Product Add-Ons WordPress plugin. The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates network-reachable, low-complexity, unauthenticated exploitation with no user interaction, which is a genuinely attacker-friendly profile - but the impact is confined to low confidentiality (C:L/I:N/A:N), meaning only a subset of sensitive data is exposed with no integrity or availability consequence. No EPSS score, CISA KEV listing, or public POC was provided in the input, so there is no positive signal of active or imminent exploitation; the signals are not conflicting so much as incomplete. CWE-497 (Exposure of Sensitive System Information) combined with Patchstack's description ('Retrieve Embedded Sensitive Data') is consistent with the CVSS confidentiality-only rating. On balance this is a real but lower-priority issue: easy to exploit yet limited in blast radius. Absent EPSS/KEV/POC data, it should be patched on a normal cadence rather than treated as an emergency, with priority rising if the exposed data includes credentials, keys, or PII.

Exploit ScenarioDerived

A remote, unauthenticated attacker sends a crafted request to a WooCommerce store running a vulnerable version (≤4.34.0) of the YITH Product Add-Ons plugin and retrieves sensitive embedded data the plugin fails to protect. Because the CVSS vector is AV:N/AC:L/PR:N/UI:N, no login, no special timing, and no victim interaction are required. No public exploit code was identified in the provided data, so exploitation currently requires the attacker to independently discover the vulnerable endpoint/parameter.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 10, 2026

Unauthenticated remote attackers can retrieve embedded sensitive system information from WordPress/WooCommerce sites running the YITH WooCommerce Product Add-Ons plugin through version 4.34.0. The flaw (CWE-497) is network-reachable with no privileges or user interaction required per the CVSS vector AV:N/AC:L/PR:N/UI:N, but the confidentiality impact is bounded (C:L), so exposure is limited to a specific set of sensitive data rather than a full site or database compromise, yielding a moderate CVSS 3.1 score of 5.3. No public exploit code or confirmed active exploitation was identified at time of analysis, and EPSS/KEV signals were not provided in the source data; risk is concentrated among unpatched sites with this plugin installed and active.

RemediationAI

No vendor-released patch was identified in the provided data at time of analysis, so the primary action is to update the YITH WooCommerce Product Add-Ons plugin to the latest version published by YITH beyond 4.34.0 and confirm the installed version no longer falls in the affected range, tracking the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/yith-woocommerce-product-add-ons/vulnerability/wordpress-yith-woocommerce-product-add-ons-plugin-4-34-0-sensitive-data-exposure-vulnerability?_s_id=cve for the confirmed fixed release. If an update is not immediately deployable, compensating controls include deactivating the plugin where its add-on functionality is not required (removes exposure entirely but disables product add-on features on the storefront), and, where it must stay enabled, blocking unauthenticated requests to the plugin's asset and endpoint paths at the WAF or reverse proxy (for example rules scoped to /wp-content/plugins/yith-woocommerce-product-add-ons/ and its AJAX/REST entry points), accepting the trade-off that overly broad rules can break legitimate storefront behavior and must be tested against real product pages. Because the vector is PR:N and requires no user interaction, IP allow-listing or authentication gates on the affected paths should be applied only where the storefront can tolerate them, and exposure should be re-checked after each plugin or WooCommerce update since bundled assets may change paths.

Affected VersionsENISA

YITH WooCommerce Product Add-Ons n/a ≤4.34.0

Affected Packages

euvd yith_woocommerce_product_add_ons 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 vulnerability is classified as CWE-497, Exposure of Sensitive System Information to an Unauthorized Control Sphere, which describes a component returning data it should have kept internal - for example configuration values, internal paths, environment details, or other sensitive strings that are packaged or embedded alongside the plugin's code and served without an appropriate authorization or capability check. The affected component is the WordPress plugin YITH WooCommerce Product Add-Ons, tracked by the vendor wildcard CPE cpe:2.3:a:yith:yith_woocommerce_product_add-ons:*:*:*:*:*:*:*:* (all versions as enumerated, with the affected range given as n/a through 4.34.0). WordPress plugins operate inside the CMS request lifecycle, so an endpoint or file reachable over HTTP inherits the site's public reachability; combined with the PR:N/UI:N vector, this means the disclosure path can be exercised by anyone who can reach the site, without an account or victim interaction. The absence of integrity or availability impact (I:N/A:N) and the limited confidentiality rating (C:L) indicate the exposed data is a bounded set rather than bulk exfiltration capability.

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 5.3 MEDIUM

Unauthenticated network-reachable disclosure with no user interaction (AV:N/AC:L/PR:N/UI:N); bounded confidentiality-only impact per CWE-497, hence C:L and I:A:N.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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
Low
Integrity
None
Availability
None

DescriptionCVE.org

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in YITH YITH WooCommerce Product Add-Ons allows Retrieve Embedded Sensitive Data.

This issue affects YITH WooCommerce Product Add-Ons: from n/a through 4.34.0.

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Prevalence
Medium
commercial WooCommerce add-on plugin, common but not universally deployed
Data Quality
7 sources
Confidence: High

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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