CVE-2023-7027Network attack vector

Unauthenticated stored XSS via unsanitized device header

Published Jan 3, 2024 · Updated Apr 8, 2026

Stored XSS in Fullworks Plugins Post SMTP 2.8.7 and earlier allows remote attackers to inject scripts through the device header. The connect_app() function stores the header without sanitization, and section() echoes the saved device value without output escaping. No authentication is required to plant the payload, but an administrator must open the mobile application settings page for the script to execute in that browser context.

CVSS severity7.2
High
EPSS probability0.94%
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 Fullworks Plugins Post SMTP 2.8.7 and earlier allows remote attackers to inject scripts through the device header. The connect_app() function stores the header without sanitization, and section() echoes the saved device value without output escaping. No authentication is required to plant the payload, but an administrator must open the mobile application settings page for the script to execute in that browser context.

The record

CVE
CVE-2023-7027
Published
Jan 3, 2024
Updated
Apr 8, 2026
Vendor
Fullworks Plugins
Product
Post SMTP
Classifications
CWE-79, T1190, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 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 <=2.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fullworks Plugins · Post SMTPversion=0 <=2.8.7

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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')
T1190Exploit Public-Facing Application
T1059.007JavaScript/JScript

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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