CVE-2026-18555Network attack vectorHinoki check available

Reflected script execution via unescaped icn parameter

Published Sep 16, 2026 · Updated Sep 16, 2026

Reflected cross-site scripting in WordPlus Better Messages 2.15.22 and earlier allows remote attackers to inject scripts via the icn parameter. The inc/shortcodes.php output path inserts the request's icn value into page markup without adequate sanitization or context-appropriate escaping. Exploitation requires a user to follow a crafted link, after which the script runs in the affected site's browser context and can read or alter page data.

CVSS severity6.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected cross-site scripting in WordPlus Better Messages 2.15.22 and earlier allows remote attackers to inject scripts via the icn parameter. The inc/shortcodes.php output path inserts the request's icn value into page markup without adequate sanitization or context-appropriate escaping. Exploitation requires a user to follow a crafted link, after which the script runs in the affected site's browser context and can read or alter page data.

The record

CVE
CVE-2026-18555
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
WordPlus
Product
Better Messages
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 <=2.15.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WordPlus · Better Messagesversion=0 <=2.15.22

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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 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-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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