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CVE Record

CVE-2026-1454: Responsive Contact Form Builder & Lead Generation Plugin <= 2.0.1 - Unauthenticated Stored Cross-Site Scripting

The Responsive Contact Form Builder & Lead Generation Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.0.1 via form field submissions. This is due to insufficient input sanitization in the lfb_lead_sanitize() function which omits certain field types from its sanitization whitelist, combined with an overly permissive wp_kses() filter at output time that allows onclick attributes on anchor tags. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views the lead entries in the WordPress dashboard.

HighCVSS 7.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A WordPress contact form plugin can store malicious script submitted through public forms. When an administrator views lead entries in the dashboard, that script can run in the admin’s browser. This creates risk to site administration and data handled in WordPress, especially on public-facing sites using affected plugin versions.

Executive priority

Treat as high priority for public WordPress sites using this plugin. The issue can turn ordinary form submissions into code execution in an administrator’s browser, potentially affecting site integrity and administrative trust. Prioritize inventory, update or disablement, and review of stored leads.

Technical view

CVE-2026-1454 is stored XSS in ThemeHunk Lead Form Builder & Contact Form, reported for versions up to and including 2.0.1. The issue involves incomplete sanitization in lfb_lead_sanitize() and permissive output filtering allowing onclick attributes on anchor tags. The CVSS 3.1 score is 7.2, high.

Likely exposure

Public WordPress sites using Responsive Contact Form Builder / Lead Form Builder & Contact Form up to 2.0.1 are exposed, especially where unauthenticated visitors can submit forms and administrators review leads in WordPress.

Exploitation context

The source bundle does not cite active exploitation, and the CVE is not marked KEV. Exploitation requires malicious content to be stored through a form submission and later rendered in an administrator-facing lead view.

Researcher notes

The evidence points to sanitization gaps in form submission handling and unsafe rendering in the lead display path. The provided references include the vulnerable code locations and a WordPress plugin repository changeset. The bundle does not provide a named fixed version or proof of exploitation in the wild.

Mitigation direction

  • Inventory WordPress sites for the affected plugin and version.
  • Upgrade beyond version 2.0.1 if a vendor-approved fixed release is available.
  • If no safe update is available, disable the plugin until vendor guidance is confirmed.
  • Restrict administrator access and review of leads to trusted networks where feasible.
  • Monitor vendor, WordPress plugin repository, and Wordfence guidance for remediation details.

Validation and detection

  • Confirm whether the plugin is installed and active on each WordPress site.
  • Record the installed plugin version and compare it to 2.0.1.
  • Review stored lead entries for unexpected links, event attributes, or script-like content.
  • Check WordPress admin activity logs for unusual actions after lead review.
  • Verify the deployed plugin includes the referenced changeset or later vendor fix.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-1454 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.2CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N3.92.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.2High
CVSS 3.1 vector shape for CVE-2026-1454Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
themehunkLead Form Builder & Contact Form0unaffected
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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