CVE-2024-10103Public exploitNetwork attack vector

Admin-level browser script execution via unsanitized form HTML

Published Nov 19, 2024 · Updated Nov 19, 2024

Stored XSS in MailPoet before 5.3.2 allows remote authenticated users with administrator privileges to execute scripts in visitors' browsers. The Custom HTML block stores an unsanitized Custom Text value in form settings and renders it during preview or later form access. Administrator or editor access with unfiltered_html disabled is required; execution in a victim's session can expose session data or perform actions with that victim's privileges.

CVSS severity6.1
Medium
EPSS probability0.35%
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 5.3.2 allows remote authenticated users with administrator privileges to execute scripts in visitors' browsers. The Custom HTML block stores an unsanitized Custom Text value in form settings and renders it during preview or later form access. Administrator or editor access with unfiltered_html disabled is required; execution in a victim's session can expose session data or perform actions with that victim's privileges.

The record

CVE
CVE-2024-10103
Published
Nov 19, 2024
Updated
Nov 19, 2024
Vendor
MailPoet
Product
MailPoet
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 2024Record 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 <5.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MailPoet · MailPoetversion=0 <5.3.2
Automattic · MailPoetversion=0 <5.3.2

Published CVSS scores

6.1CISA ADP VulnrichmentCVSS: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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