CVE-2026-5169Network attack vector

Administrator-only stored XSS via unescaped Form Header

Published Apr 8, 2026 · Updated Apr 8, 2026

Stored XSS in Udara Madushan Inquiry Form to Posts or Pages 1.0 and earlier allows remote authenticated users to run scripts in visitors' browsers. The plugin saves the Form Header option with update_option() without sufficient sanitization, then emits it unescaped in an HTML attribute and shortcode content. Administrator-level access is required to plant the payload; it executes when a user opens the settings page or a page containing the inquiry_form shortcode.

CVSS severity4.4
Medium
EPSS probability0.25%
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 Udara Madushan Inquiry Form to Posts or Pages 1.0 and earlier allows remote authenticated users to run scripts in visitors' browsers. The plugin saves the Form Header option with update_option() without sufficient sanitization, then emits it unescaped in an HTML attribute and shortcode content. Administrator-level access is required to plant the payload; it executes when a user opens the settings page or a page containing the inquiry_form shortcode.

The record

CVE
CVE-2026-5169
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Udara Madushan
Product
Inquiry Form to Posts or Pages
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Udara Madushan · Inquiry Form to Posts or Pagesversion=0 <=1.0

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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