CVE-2026-16942Public exploitNetwork attack vector

Author-level stored XSS via unsanitized custom pages

Published Aug 5, 2026 · Updated Aug 5, 2026

Stored cross-site scripting in Wise IT WP Custom HTML Page 0.6.2 and earlier allows remote authenticated users to run JavaScript via custom pages. The custom page handler saves the html_code meta field without sanitizing it or checking unfiltered_html, then serves that value unescaped at its public permalink. Author access is sufficient; the script executes in each visitor's browser, including an administrator's authenticated session.

CVSS severity5.4
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Wise IT WP Custom HTML Page 0.6.2 and earlier allows remote authenticated users to run JavaScript via custom pages. The custom page handler saves the html_code meta field without sanitizing it or checking unfiltered_html, then serves that value unescaped at its public permalink. Author access is sufficient; the script executes in each visitor's browser, including an administrator's authenticated session.

The record

CVE
CVE-2026-16942
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Wise IT
Product
WP Custom HTML Page
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <=0.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wise IT · WP Custom HTML Pageversion=0 <=0.6.2

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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