CVE-2025-0521

HIGH

Post SMTP < 3.0.2 - Unauthenticated Stored Cross-Site Scripting via From and Subject Parameters

Title source: llm

Description

The Post SMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the from and subject parameter in all versions up to, and including, 3.0.2 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.

References (2)

Core 2

Core References

Patch

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3237626%40post-smtp%2Ftrunk&old=3229076%40post-smtp%2Ftrunk&sfp_email=&sfph_mail=

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/366dfbf1-870c-4ce3-abc4-a2b2f4e72175?source=cve

Scores

CVSS v3 7.2

EPSS 0.0030

EPSS Percentile 21.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

saadiqbal/Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App < 3.0.2

wpexperts/post_smtp < 3.1.0

Published Feb 18, 2025

Tracked Since Feb 18, 2026