CVE-2025-53279Network attack vector

Contributor-level stored XSS via unescaped popup settings

Published Jun 27, 2025 · Updated Apr 28, 2026

Stored XSS in WebHolics Popup addon for Ninja Forms 3.4 and earlier allows remote authenticated users to inject scripts through popup settings. The plugin stores contributor-supplied admin settings without adequate input sanitization and renders them into pages without output escaping. Contributor-level access is required, and the payload executes when another user visits an affected page, enabling actions in that user's browser context.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in WebHolics Popup addon for Ninja Forms 3.4 and earlier allows remote authenticated users to inject scripts through popup settings. The plugin stores contributor-supplied admin settings without adequate input sanitization and renders them into pages without output escaping. Contributor-level access is required, and the payload executes when another user visits an affected page, enabling actions in that user's browser context.

The record

CVE
CVE-2025-53279
Published
Jun 27, 2025
Updated
Apr 28, 2026
Vendor
WebHolics
Product
Popup addon for Ninja Forms
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.4 changes=[{"at":"3.5","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WebHolics · Popup addon for Ninja Formsversion=0 <=3.4 changes=[{"at":"3.5","status":"unaffected"}]

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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