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ThemeStek Extras CVE-2026-94160

| EUVDEUVD-2026-96375 HIGH
Cross-site Scripting (XSS) (CWE-79)
2026-10-10 Patchstack GHSA-73mv-wp3x-q2hg
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
    Craft malicious URL with XSS payload
  2. Delivery
    Deliver link to victim via phishing
  3. Exploit
    Victim clicks and loads reflected payload
  4. Execution
    Script executes in victim browser session
  5. Impact
    Hijack session or perform actions as victim

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

Exploitation requires an attacker to deliver a crafted URL (with a payload reflected by the plugin's input handling) and have a victim user actively click it - this user-interaction requirement (CVSS UI:R) is the primary limiting factor, as the attack cannot self-propagate or fire without victim engagement. No authentication is required of the attacker (PR:N), and it works against affected installations of the ThemeStek Extras for LabtechCO Theme plugin (versions through 8.4), but the site must have this specific plugin installed and active, which narrows the exposed population. Because the flaw is reflected (non-persistent), the payload is not stored and each exploitation needs a fresh lure, further constraining real-world impact.

Impact

This is a reflected cross-site scripting (CWE-79) flaw rated CVSS 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), with the scope change and triple low impacts inflating the base score above what the real-world threat typically warrants for reflected XSS. The CVSS signals network vector, low complexity, and no required privileges, but the mandatory user interaction (UI:R) is the key limiting factor: an attacker cannot exploit this autonomously and must socially engineer a logged-in or targeted victim into clicking a crafted link. No EPSS score, SSVC decision data, KEV listing, or POC indicator was supplied in the input, so there is no public exploit identified at time of analysis and no evidence of active or automatable exploitation. The practical risk is moderate-to-low: reflected XSS is non-persistent and one-click-dependent, and the affected software is a niche add-on, so this should be patched on a normal cadence rather than treated as an emergency. Note the scope-change/impact-driven 7.1 may overstate urgency relative to the UI:R constraint - defenders should weight the user-interaction requirement heavily.

Exploit ScenarioDerived

An attacker crafts a malicious URL containing a script payload that is reflected unsanitized into a page generated by the ThemeStek Extras for LabtechCO Theme plugin, then lures a WordPress site visitor or administrator into clicking it (e.g., via phishing). When the victim loads the link, the injected JavaScript executes in their browser session in the context of the vulnerable site, potentially enabling session/cookie theft or actions on behalf of the victim. No public exploit code was identified in the provided data, and successful exploitation hinges on the victim interacting with the attacker-supplied link.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 10, 2026

Reflected cross-site scripting (CWE-79) in the WordPress plugin ThemeStek Extras for LabtechCO Theme, affecting all versions through 8.4, allows an unauthenticated attacker to inject script that executes in a victim's browser when a crafted URL is visited. Exploitation is constrained because the payload is not stored: an attacker must lure a victim into clicking a malicious link (CVSS UI:R), and the target site must have this specific plugin installed and active. The flaw is rated CVSS 7.1 with scope change (S:C) and low confidentiality, integrity and availability impacts; no public exploit code has been identified at time of analysis.

RemediationAI

No vendor-released patch is identified in the available data: the advisory covers versions through 8.4 and no fixed version number is published, so confirm the current release status with the vendor (themeStek) or via the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/themestek-labtechco-extras/vulnerability/wordpress-themestek-extras-for-labtechco-theme-plugin-8-4-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve before assuming an upgrade path exists. If the plugin is not essential, deactivating and removing it eliminates the exposure entirely, at the cost of losing its LabtechCO theme functionality. Where the plugin must remain, compensate by deploying WAF or reverse-proxy rules that block script-bearing payloads in reflected query and form parameters on plugin endpoints - accepting the trade-off of potential false positives on legitimate input and no protection against a bypassed signature - and, if the plugin code can be maintained in-house, apply output encoding/escaping to the reflected input as the vendor would. Restricting site exposure and monitoring for crafted-URL lures does not remove the flaw, since the vulnerability is purely client-side reflected XSS and no server-side authentication gate can compensate for the UI:R precondition.

Affected VersionsENISA

ThemeStek Extras for LabtechCO Theme 0 ≤8.4

Affected Packages

euvd themestek_extras_for_labtechco_theme 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 a WordPress plugin (ThemeStek Extras for LabtechCO Theme) mapped under the CPE cpe:2.3:a:themestek:themestek_extras_for_labtechco_theme, with the version wildcard indicating the entire published range through 8.4 is in scope. The root cause is CWE-79, improper neutralization of input during web page generation, in its reflected form: the plugin takes attacker-supplied input from an HTTP request and emits it into a generated HTML page without adequate output encoding or escaping, so script content is rendered in the origin of the WordPress site. Because the vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L, the attack surface is network-reachable and requires no attacker authentication, but the scope-change component (S:C) means the injected script can affect resources beyond the vulnerable plugin component - typically the surrounding site origin, its cookies and tokens - while the triple low impact ratings reflect constrained but non-trivial effects rather than full takeover. The reflected (non-persistent) nature means nothing is stored server-side; each successful hit requires a fresh crafted request and a fresh victim interaction, which materially limits the blast radius compared with a stored XSS flaw in the same plugin.

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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 7.1 HIGH

Reflected XSS exploitable remotely with no attacker privileges (PR:N) but requiring victim link-click (UI:R); scope changes to the browser context (S:C) with limited C/I/A impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/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

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themeStek ThemeStek Extras for LabtechCO Theme themestek-labtechco-extras allows Reflected XSS.This issue affects ThemeStek Extras for LabtechCO Theme: from n/a through 8.4.

Executive ViewAI

Why It Matters

A high-severity reflected cross-site scripting flaw in the ThemeStek Extras plugin shipped with the LabtechCO WordPress theme (all versions through 8.4) leaves any site running that plugin exposed to script injection via a crafted link, and no vendor patch is currently available. Exploitation requires luring a user into clicking a malicious URL, which limits likelihood, but public-facing marketing, support, or customer portals built on these themes remain materially at risk of impersonation, credential theft, or reputational damage. Leadership should care because remediation currently depends on asset inventory and interim mitigations rather than a simple update.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: uninstall or disable the ThemeStek Extras plugin where it is not required; block or sanitize reflected script payloads in request parameters at the WAF or reverse proxy; enforce a restrictive Content-Security-Policy; enable MFA and network-restrict access to WordPress administrative interfaces; monitor logs for crafted-URL activity and phishing lures; and user awareness messaging against unsolicited links to affected domains.

Threat Intelligence Overview

EPSS Score
0.1%
Top 97% exploitable
Prevalence
Low
niche WordPress add-on tied to a single specific commercial theme
Social Media
1
Sightings
Data Quality
6 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 HIGH
CISA KEV No
Public POC No
EPSS 0.1%
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
Medium
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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