CVE-2023-6629Public exploitNetwork attack vector

Script execution via unescaped msg parameter

Published Jan 3, 2024 · Updated Apr 8, 2026

Reflected XSS in Fullworks Plugins Post SMTP 2.8.6 and earlier allows remote attackers to run scripts via a crafted msg parameter. NewWizard.php reads msg from the configuration-wizard URL and renders it into an admin-page notice without sanitization or output escaping. Exploitation requires a user to follow the crafted link, and the resulting script runs in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.44%
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 Fullworks Plugins Post SMTP 2.8.6 and earlier allows remote attackers to run scripts via a crafted msg parameter. NewWizard.php reads msg from the configuration-wizard URL and renders it into an admin-page notice without sanitization or output escaping. Exploitation requires a user to follow the crafted link, and the resulting script runs in that user's browser context.

The record

CVE
CVE-2023-6629
Published
Jan 3, 2024
Updated
Apr 8, 2026
Vendor
Fullworks Plugins
Product
Post SMTP
Classifications
CWE-79, T1203
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 <=2.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fullworks Plugins · Post SMTPversion=0 <=2.8.6

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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