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AI Engine CVE-2026-65545

| EUVDEUVD-2026-53975 HIGH
Cross-site Scripting (XSS) (CWE-79)
2026-08-06 Patchstack GHSA-m853-gvx3-8j6r
7.1
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
    Enumerate target WordPress site for AI Engine plugin presence
  2. Delivery
    Identify unauthenticated injection point in plugin input vector
  3. Exploit
    Craft malicious XSS payload embedded in URL or form parameter
  4. Execution
    Deliver crafted link to authenticated administrator via phishing or redirect
  5. Persist
    Victim browser renders injected JavaScript in admin session context
  6. Impact
    Exfiltrate session cookie or execute unauthorized admin actions

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

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 to deliver the XSS payload, as confirmed by PR:N in the CVSS vector. Exploitation does require victim interaction (UI:R per CVSS): a human user - ideally an authenticated WordPress administrator - must trigger the malicious content, such as clicking a crafted link or visiting a URL with the injected parameter. The specific plugin feature, endpoint, or input field containing the injection point is not disclosed in available intelligence. Exploitation is limited to WordPress installations with the AI Engine plugin installed and activated on versions up to and including 3.6.8; sites not running this plugin are unaffected. The most impactful scenario depends on a privileged (e.g., admin-level) victim interacting with the payload, since the scope change enables actions across the victim's authenticated session.

Impact

The CVSS 7.1 score captures real structural risk: network-accessible (AV:N), low complexity (AC:L), no authentication required (PR:N), and scope change (S:C) that enables impact on privileged user sessions. The primary exploitation constraint is mandatory victim interaction (UI:R), meaning the attacker cannot achieve impact passively - a social engineering step is required to deliver the payload to a logged-in user. No EPSS data was available in the provided intelligence, limiting probabilistic exploitation likelihood assessment. The absence from CISA KEV and unconfirmed public exploit code reduce immediate urgency relative to the raw score. However, XSS against WordPress plugins with unauthenticated injection points is a well-understood and frequently exploited attack class; generic exploitation tooling lowers the barrier significantly once a specific site is targeted. For deployments where administrators routinely browse the WordPress dashboard while authenticated, the risk of full administrative session compromise is realistic and should be treated as a priority patch.

Exploit ScenarioDerived

An attacker identifies a WordPress site running AI Engine 3.6.8 or earlier with a public-facing AI-powered input (such as a chatbot or content form) and crafts a URL or input payload embedding malicious JavaScript that the plugin reflects or stores without proper encoding. The attacker delivers this as a phishing link to a site administrator; when the administrator's browser renders the payload while authenticated, the injected script exfiltrates the WordPress session cookie or silently creates a rogue admin account. No confirmed public exploit code exists, but the attack class is well-understood and requires no specialized tooling.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 06, 2026

Cross-site scripting in the AI Engine WordPress plugin (versions up to and including 3.6.8) allows remote unauthenticated attackers to inject arbitrary JavaScript into a victim's browser session when the victim interacts with a crafted payload. The CVSS scope change (S:C) confirms execution occurs outside the plugin's security context, enabling session hijacking, credential theft, or unauthorized administrative actions against authenticated WordPress users. No public exploit code has been confirmed and this vulnerability does not appear in the CISA KEV catalog at time of analysis.

RemediationAI

Update the AI Engine WordPress plugin to a version beyond 3.6.8 using the WordPress plugin update mechanism or by manually downloading from the WordPress plugin repository. The exact patched release version is not independently confirmed in available intelligence - verify the current stable version against the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/ai-engine/vulnerability/wordpress-ai-engine-plugin-3-6-3-cross-site-scripting-xss-vulnerability) before deploying. As a compensating control while patching is pending, consider disabling public-facing AI Engine features such as chatbot widgets or unauthenticated submission forms at the plugin settings level or via web server configuration to eliminate the unauthenticated injection surface; note this may disrupt intended AI-powered site functionality. A web application firewall with XSS signature rules can provide partial mitigation but should not substitute for patching, as WAF bypass for XSS is well-documented and reliable.

Affected VersionsENISA

AI Engine n/a ≤3.6.8

Affected Packages

euvd ai_engine 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

CWE-79 (Improper Neutralization of Input During Web Page Generation) reflects insufficient sanitization or output encoding of attacker-controlled data before rendering it in the browser as executable script. The affected component is the AI Engine WordPress plugin (CPE: cpe:2.3:a:jordy_meow:ai_engine:*:*:*:*:*:*:*:*) by Jordy Meow, which integrates AI-powered capabilities - including chatbot interfaces, content generation tools, and AI assistants - directly into WordPress sites via public-facing UI elements. The unauthenticated attack vector (PR:N per CVSS) indicates the injection point is accessible without any login, likely through a public form, chatbot input, or URL parameter rendered by the plugin. The scope change metric (S:C) is consistent with reflected or stored XSS where payload execution crosses into the browser security context of another user, most dangerously an authenticated administrator.

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Severity by source

Vendor (Patchstack) PRIMARY 7.1 HIGH
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
vuln.today AI 6.1 MEDIUM

XSS with scope change warrants S:C, C:L, and I:L; availability reduced to N since XSS does not meaningfully disrupt service availability.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

DescriptionCVE.org

Unauthenticated Cross Site Scripting (XSS) in AI Engine <= 3.6.8 versions.

Executive ViewAI

Why It Matters

The AI Engine WordPress plugin (versions ≤3.6.8) contains an unauthenticated cross-site scripting vulnerability allowing attackers to inject malicious code into user browsers and hijack authenticated sessions, potentially leading to credential theft and unauthorized administrative access. Any WordPress installation running the affected plugin exposes user accounts and administrative functions to compromise. No vendor patch is currently available, requiring immediate remediation.

Business Impact: High
Compensating Controls

Disable the vulnerable plugin immediately to eliminate attack surface. If temporary continued operation is unavoidable, deploy Web Application Firewall rules to detect and block XSS payloads, restrict plugin functionality to authorized administrative users only, implement strict Content Security Policy headers to limit script injection impact, and enable enhanced audit logging and real-time monitoring of authentication events and administrative actions for early detection of account compromise.

Threat Intelligence Overview

EPSS Score
0.2%
Top 92% exploitable
Prevalence
Medium
popular WordPress AI plugin, not universally deployed across sites
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 0.2%
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
No
Human Impact
High
Technical Impact
Partial

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

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