CVE-2024-12743Public exploitNetwork attack vector

Stored XSS via unescaped form blocks

Published May 15, 2025 · Updated May 20, 2025

Stored XSS in MailPoet before 5.5.2 allows remote authenticated users with administrative access to run scripts through crafted form blocks. The form builder stores Header and Footer block content without adequate sanitization and renders it in Preview without context-appropriate escaping. Administrative access and disabled unfiltered_html are required, and a user must preview the crafted form before the injected script runs.

CVSS severity4.8
Medium
EPSS probability0.34%
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 MailPoet before 5.5.2 allows remote authenticated users with administrative access to run scripts through crafted form blocks. The form builder stores Header and Footer block content without adequate sanitization and renders it in Preview without context-appropriate escaping. Administrative access and disabled unfiltered_html are required, and a user must preview the crafted form before the injected script runs.

The record

CVE
CVE-2024-12743
Published
May 15, 2025
Updated
May 20, 2025
Vendor
Automattic
Product
MailPoet
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 20, 2025Record 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 <5.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Automattic · MailPoetversion=0 <5.5.2

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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