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Hostme v2 CVE-2026-112849

| EUVDEUVD-2026-108955 HIGH
Cross-site Scripting (XSS) (CWE-79)
2026-10-23 Patchstack GHSA-hjrr-8v6p-wh9j
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
    Lure victim to click link
  3. Exploit
    Payload reaches vulnerable DOM sink
  4. Execution
    Script executes in victim browser session
  5. Impact
    Hijack session or perform actions as user

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 a victim to interact with attacker-supplied content - specifically visiting or clicking a crafted URL/input that the Hostme v2 theme's client-side JavaScript renders into the DOM without proper neutralization (DOM-based XSS). This user-interaction requirement (UI:R) is the primary limiting factor: the attack cannot succeed purely server-side or without a targeted victim action. No attacker authentication is required (PR:N). The exact vulnerable parameter or DOM sink is not described in the available sources. Affected deployments are WordPress sites running the Hostme v2 theme at versions up to and including 7.0.

Impact

This is a DOM-based Cross-Site Scripting flaw (CWE-79) in the AivahThemes Hostme v2 WordPress theme, scored CVSS 7.1 with vector AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. The vector indicates remote, network-based, low-complexity exploitation requiring no attacker privileges (PR:N) but mandatory victim interaction (UI:R), with a changed scope (S:C) reflecting that injected script executes in the victim's browser context rather than the vulnerable component, and only low confidentiality/integrity/availability impact. The vuln.today decision label is 'this_week' rather than act_now/emergency, consistent with a moderate-severity client-side bug. No CISA KEV listing is present, no EPSS probability is supplied in the input, and no working exploit code is referenced - the only reference is a Patchstack advisory entry, not a PoC. In short, the signals are internally consistent: a genuine but not emergency-grade issue. The required user interaction and the limited, scope-changed impact (session/browser-context compromise rather than server takeover) place this below critical server-side flaws. Missing data worth noting: EPSS is absent, so widespread automated exploitation likelihood cannot be quantified, and no fixed version is stated in the provided data.

Exploit ScenarioDerived

An attacker crafts a malicious URL or page input that, when processed by the Hostme v2 theme's client-side code, injects attacker-controlled script into the DOM of a victim's browser. A logged-in site visitor or administrator who clicks the crafted link (UI:R) triggers execution of the script in their session context. No public exploit code is identified at time of analysis; only a Patchstack advisory reference exists.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 23, 2026

DOM-based cross-site scripting in the AivahThemes Hostme v2 WordPress theme (versions through 7.0) allows remote attackers to execute script in a victim's browser session on an affected site. The flaw is rated CVSS 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L): no attacker authentication is required, but exploitation depends on a targeted victim visiting or clicking attacker-supplied content that the theme's client-side JavaScript renders into the DOM without neutralization, and the scope change means injected code can act beyond the vulnerable component. The exact vulnerable parameter and DOM sink are not described in the available sources; no public exploit code was identified at time of analysis and there is no CISA KEV confirmation, and the advisory reference does not state a fixed version.

RemediationAI

The supplied intelligence does not state a fixed version, so the first step is to confirm patch status against the vendor/Patchstack advisory (https://patchstack.com/database/wordpress/theme/hostmev2/vulnerability/wordpress-hostme-v2-theme-7-0-cross-site-scripting-xss-vulnerability?_s_id=cve) and, if a patched release above 7.0 is published, upgrade the theme to that exact version. Where no fix is confirmed, the most complete exposure reduction is to deactivate and remove the Hostme v2 theme from the site; the trade-off is loss of the site's current design and any theme-dependent templates or customizations, so a temporary alternative theme plus a content/design rollback plan is needed. Because this is DOM-based XSS with the rendering logic executing in the browser, server-side filtering and conventional network web-application-firewall signatures provide limited coverage, since the payload may never reach the server in a form those controls inspect; any client-side or Content-Security-Policy restriction should be treated as a partial compensating control with the caveat that tight CSP policies can break legitimate theme and third-party scripts. Restricting who can craft and distribute links to the site (for example, limiting untrusted user-generated content that links into the theme) reduces delivery paths but does not remove the underlying defect.

Affected VersionsENISA

Hostme v2 0 ≤7.0

Affected Packages

euvd hostme_v2 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 issue is CWE-79 (Improper Neutralization of Input During Web Page Generation), specifically the DOM-based variant, in a WordPress theme distributed by AivahThemes. In DOM-based XSS the vulnerability lives entirely in client-side JavaScript: a browser-side source (such as the URL fragment, query string, or other attacker-influenced client data) is passed to a DOM sink without sanitization, so the malicious payload is never necessarily transmitted to the PHP/MySQL backend and may not appear in server logs or be caught by server-side input filtering. The CVSS scope-change metric (S:C) reflects that the injected script can affect resources beyond the vulnerable theme component, such as other content or session context on the same origin. The CPE cpe:2.3:a:aivahthemes:hostme_v2:*:*:*:*:*:*:*:* identifies Hostme v2 as the affected product with no version boundaries encoded, matching the description's range of n/a through 7.0; the specific source, sink, and vulnerable parameter are not described in the available sources, so the precise trigger path is unverified.

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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

Remote, unauthenticated delivery (AV:N/PR:N) but victim must click crafted content (UI:R); injected script runs in the browser context (S:C) with limited client-side impact (C/I/A:L).

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:P/VC:N/VI:N/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 AivahThemes Hostme v2 hostmev2 allows DOM-Based XSS.This issue affects Hostme v2: from n/a through 7.0.

Executive ViewAI

Why It Matters

The Hostme v2 WordPress theme (versions through 7.0) contains a high-severity DOM-based cross-site scripting flaw that allows an attacker to execute malicious scripts in a site visitor's browser session, potentially compromising user interactions and data integrity on affected websites. Leadership should care because this can lead to session hijacking, defacement, or theft of user information, damaging customer trust and brand reputation even without direct server compromise.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include: deploying a WAF with virtual patching for XSS attempts, restricting the theme's use to low-risk sites, conducting regular security awareness training for users to avoid clicking suspicious links, and performing periodic vulnerability scans to detect exploitation attempts.

Threat Intelligence Overview

EPSS Score
0.3%
Top 84% exploitable
Prevalence
Low
niche WordPress theme from a small vendor, limited deployment footprint
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 HIGH
CISA KEV No
Public POC No
EPSS 0.3%
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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