CVE-2023-3167: Mail Queue <= 1.1 - Unauthenticated Stored Cross-Site Scripting via Email Subject

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-12 · updated 2026-06-17
Weakness: CWE-79

Description

The Mail Queue plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an email subject in versions up to, and including, 1.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

wdm-team Mail Queue: through 1.1

References

https://plugins.trac.wordpress.org/changeset/2924661/mail-queue
https://www.wordfence.com/threat-intel/vulnerabilities/id/d4aaca22-76b9-42ec-a960-65d44d696324?source=cve
https://plugins.trac.wordpress.org/changeset/2924661/mail-queue
https://www.wordfence.com/threat-intel/vulnerabilities/id/d4aaca22-76b9-42ec-a960-65d44d696324?source=cve

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