CVE-2023-1090Public exploitNetwork attack vector

Stored XSS via unescaped Tools message

Published May 2, 2023 · Updated Jan 30, 2025

Stored XSS in Birmania SMTP Mailing Queue before 2.0.1 allows remote authenticated users to execute scripts via the Tools Message setting. The Tools tab renders the stored Message value in a textarea without output escaping, so a closing textarea tag injects attacker-controlled markup. Administrator privileges and a victim visit to the affected admin page are required, and exposure is limited to sites where unfiltered_html is disabled, including multisite installations.

CVSS severity4.8
Medium
EPSS probability0.53%
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 Birmania SMTP Mailing Queue before 2.0.1 allows remote authenticated users to execute scripts via the Tools Message setting. The Tools tab renders the stored Message value in a textarea without output escaping, so a closing textarea tag injects attacker-controlled markup. Administrator privileges and a victim visit to the affected admin page are required, and exposure is limited to sites where unfiltered_html is disabled, including multisite installations.

The record

CVE
CVE-2023-1090
Published
May 2, 2023
Updated
Jan 30, 2025
Vendor
Birmania
Product
SMTP Mailing Queue
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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 <2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Birmania · SMTP Mailing Queueversion=0 <2.0.1

Published CVSS scores

4.8NIST NVDCVSS: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.

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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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