CVE-2026-3353Network attack vector

Stored XSS via unescaped API Key setting

Published Mar 21, 2026 · Updated Mar 21, 2026

Stored XSS in intermod Comment SPAM Wiper 1.2.1 and earlier allows remote authenticated users to inject scripts through the API Key setting. The plugin accepts the API Key value without sufficient sanitization and renders it in an administrative page without output escaping, causing stored script execution when that page is viewed. Exploitation requires Administrator-level access and affects only multisite installations or installations where unfiltered_html is disabled.

CVSS severity4.4
Medium
EPSS probability0.19%
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 intermod Comment SPAM Wiper 1.2.1 and earlier allows remote authenticated users to inject scripts through the API Key setting. The plugin accepts the API Key value without sufficient sanitization and renders it in an administrative page without output escaping, causing stored script execution when that page is viewed. Exploitation requires Administrator-level access and affects only multisite installations or installations where unfiltered_html is disabled.

The record

CVE
CVE-2026-3353
Published
Mar 21, 2026
Updated
Mar 21, 2026
Vendor
intermod
Product
Comment SPAM Wiper
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 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=* <=1.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

intermod · Comment SPAM Wiperversion=* <=1.2.1

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1059.007JavaScript

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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