CVE-2024-9210Network attack vector

Browser script execution via unescaped settings-page URL

Published Oct 2, 2024 · Updated Apr 8, 2026

Reflected XSS in MC4WP: Mailchimp Top Bar 1.6.0 and earlier allows remote attackers to execute scripts via a crafted settings URL. The settings-page.php view prints an add_query_arg-generated URL into an HTML attribute without escaping its return value. Exploitation requires an unauthenticated attacker to lure a user into opening a crafted link, allowing script execution in that user's browser.

CVSS severity6.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in MC4WP: Mailchimp Top Bar 1.6.0 and earlier allows remote attackers to execute scripts via a crafted settings URL. The settings-page.php view prints an add_query_arg-generated URL into an HTML attribute without escaping its return value. Exploitation requires an unauthenticated attacker to lure a user into opening a crafted link, allowing script execution in that user's browser.

The record

CVE
CVE-2024-9210
Published
Oct 2, 2024
Updated
Apr 8, 2026
Vendor
ibericode
Product
MC4WP: Mailchimp Top Bar
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2024CVE 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 <=1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ibericode · MC4WP: Mailchimp Top Barversion=0 <=1.6.0

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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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