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Ultimate Addons for Elementor CVE-2026-39739

| EUVDEUVD-2026-114273 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-10-30 Patchstack GHSA-7mf7-6mwm-hxwq
6.5
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
    Obtain low-privilege WordPress account
  2. Delivery
    Inject script into Elementor header/footer field
  3. Exploit
    Payload stored unsanitized
  4. Execution
    Admin views affected content
  5. Impact
    Script executes in admin browser session

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 authenticated WordPress account with sufficient privilege to save content into the affected Ultimate Addons for Elementor - Lite (header-footer-elementor) fields (CVSS PR:L), and it requires a victim to subsequently load the page or screen that renders the stored payload (CVSS UI:R). The specific input field and sanitization path are not described in the available sources. Limiting factors: no unauthenticated path (an account is needed), the stored script only fires when another user views the content, and only versions from n/a through 2.9.5 are affected.

Impact

This is a medium-severity stored XSS (CVSS 6.5) that should be treated as a routine, prioritized patch rather than an emergency. The provided CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) indicates network-reachable, low-complexity exploitation that nonetheless requires an authenticated low-privilege account (PR:L) and a victim's browser action (UI:R) to fire the injected script. The scope change (S:C) reflects that the payload executes in another user's security context - typically an administrator viewing attacker-supplied content. No EPSS score is supplied, the CVE is not listed in CISA KEV, and no verified exploit code is referenced - only a Patchstack advisory - so there is no signal of active exploitation. The vuln.today decision label is 'this_month,' consistent with a real-but-not-urgent stored XSS in a widely used plugin. The main gap in the data is the absence of EPSS and any confirmed fixed version; the limited-privilege and user-interaction requirements meaningfully constrain real-world risk compared to an unauthenticated XSS.

Exploit ScenarioDerived

An attacker with a low-privilege authenticated WordPress account (e.g., contributor or an account allowed to edit header/footer template content) saves a crafted payload into an affected Ultimate Addons for Elementor - Lite field. When an administrator or other user later views the page or admin screen rendering that stored content, the script executes in their browser session. No verified public exploit code is referenced; only a Patchstack advisory is cited.

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 30, 2026

Stored cross-site scripting (CWE-79) in the Ultimate Addons for Elementor - Lite plugin (slug header-footer-elementor) affects every release through 2.9.5. An authenticated WordPress user who holds enough privilege to save content into the affected plugin fields can persist a script payload that later executes in the browser of another user who loads the page or screen rendering it, giving a scope-changed (S:C) impact rated 6.5 under CVSS 3.1. The flaw requires an account (PR:L) and victim interaction (UI:R); it is not listed in CISA KEV and no public exploit was identified at time of analysis, so it should be handled as a routine, prioritized patch within the current monthly cycle rather than an emergency.

RemediationAI

No fixed version is named in the supplied data; the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/header-footer-elementor/vulnerability/wordpress-ultimate-addons-for-elementor-lite-plugin-2-9-5-cross-site-scripting-xss-vulnerability?_s_id=cve is the authoritative source and should be checked for the patched release, and because the affected range ends at 2.9.5, any plugin update above 2.9.5 should be treated as the target once the advisory confirms it - until then, treat 2.9.5 and earlier as vulnerable. As compensating controls tied to the assessed exploitation conditions, restrict which WordPress roles and individual accounts may save content that flows into the plugin's header/footer fields, since the attack requires an authenticated account with that privilege (PR:L); the trade-off is reduced authoring autonomy for editors and contributors. Review existing stored header/footer configuration and any custom template content for injected markup, noting that the payload only fires when another user views the affected output (UI:R), so detection should look for unexpected script or HTML in plugin-managed fields. No patch data in the input confirms a vendor-released fix version, so re-verify the advisory before closing out the finding.

Affected VersionsENISA

Ultimate Addons for Elementor - Lite 0 ≤2.9.5

Affected Packages

euvd ultimate_addons_for_elementor_lite 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, Ultimate Addons for Elementor - Lite, whose header/footer elementor functionality accepts and later re-renders user-supplied content inside generated web pages. The root cause is improper neutralization of input during web page generation, classed as CWE-79 cross-site scripting, in its stored variant: rather than reflecting a value back in a single response, the malicious input is persisted and re-emitted whenever the affected template output is rendered, so a single injection can fire for multiple viewers. CPE data identifies brainstorm_force:ultimate_addons_for_elementor_-_lite with no version constraints, while the description bounds the vulnerable range at releases from n/a through 2.9.5. The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L indicates a network-reachable attack that needs only low-privileged authenticated access, requires a victim to load the crafted output, and crosses a scope boundary so the injected script acts in the context of the rendered page with limited confidentiality, integrity and availability impact. The precise input field and sanitization path involved are not described in the available sources.

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Severity by source

Vendor (Patchstack) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
vuln.today AI 6.5 MEDIUM

Authenticated low-privilege user stores the payload (PR:L), a victim must render it (UI:R), and execution in the victim's context crosses a privilege boundary (S:C) with limited C/I/A impact typical of stored XSS.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/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
Low
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 Brainstorm Force Ultimate Addons for Elementor - Lite header-footer-elementor allows Stored XSS.This issue affects Ultimate Addons for Elementor - Lite: from n/a through 2.9.5.

Threat Intelligence Overview

EPSS Score
0.2%
Top 90% exploitable
Prevalence
Medium
popular Elementor header/footer WordPress plugin, large install base
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 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
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
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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