CVE-2023-3082Network attack vector

Stored script execution via unescaped email logs

Published Jul 12, 2023 · Updated Apr 8, 2026

Stored cross-site scripting in Post SMTP 2.5.7 and earlier allows remote attackers to inject scripts through crafted email content. The backend email-log popup renders stored message bodies without sufficient sanitization or output escaping, causing attacker-controlled HTML to execute when the log is opened. No WordPress account is required to supply the email, but execution requires an administrator or other authorized log viewer to open the injected message.

CVSS severity7.2
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Post SMTP 2.5.7 and earlier allows remote attackers to inject scripts through crafted email content. The backend email-log popup renders stored message bodies without sufficient sanitization or output escaping, causing attacker-controlled HTML to execute when the log is opened. No WordPress account is required to supply the email, but execution requires an administrator or other authorized log viewer to open the injected message.

The record

CVE
CVE-2023-3082
Published
Jul 12, 2023
Updated
Apr 8, 2026
Vendor
Fullworks Plugins
Product
Post SMTP
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 12, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fullworks Plugins · Post SMTPversion=0 <=2.5.7

Published CVSS scores

7.2Wordfence CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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