CVE-2020-12462Network attack vector

Stored XSS via nonce-free form import

Published Apr 29, 2020 · Updated Aug 4, 2024

CSRF in Ninja Forms before 3.4.24.2 allows remote attackers to store JavaScript by inducing an administrator to import a crafted form. The legacy-mode ninja_forms_ajax_import_form AJAX handler checks capability but not the request nonce, and accepts custom HTML in imported forms. An administrator must visit an attacker-controlled link while authenticated; the stored script then executes in visitors' browsers and permits page-content modification or data access within that browser context.

CVSS severity6.1
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Ninja Forms before 3.4.24.2 allows remote attackers to store JavaScript by inducing an administrator to import a crafted form. The legacy-mode ninja_forms_ajax_import_form AJAX handler checks capability but not the request nonce, and accepts custom HTML in imported forms. An administrator must visit an attacker-controlled link while authenticated; the stored script then executes in visitors' browsers and permits page-content modification or data access within that browser context.

The record

CVE
CVE-2020-12462
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.8WordfenceCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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