CVE-2023-3779Network attack vector

MailChimp API key disclosure via page source

Published Jul 20, 2023 · Updated Apr 8, 2026

Information disclosure in Essential Addons for Elementor 5.8.1 and earlier allows remote attackers to read a MailChimp API key. The premium MailChimp widget embeds the configured key in the HTML source of every page on which the block is rendered instead of keeping it server-side. Exposure requires the premium plugin and an enabled MailChimp block on a public page; no authentication or user interaction is required to retrieve the credential.

CVSS severity5.3
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Essential Addons for Elementor 5.8.1 and earlier allows remote attackers to read a MailChimp API key. The premium MailChimp widget embeds the configured key in the HTML source of every page on which the block is rendered instead of keeping it server-side. Exposure requires the premium plugin and an enabled MailChimp block on a public page; no authentication or user interaction is required to retrieve the credential.

The record

CVE
CVE-2023-3779
Published
Jul 20, 2023
Updated
Apr 8, 2026
Vendor
ReviewX Team
Product
Essential Addons for Elementor
Classifications
CWE-200, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2023CVE 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?

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  1. Affected versionversion=0 <=5.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ReviewX Team · Essential Addons for Elementorversion=0 <=5.8.1

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1528Steal Application Access Token

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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